Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries the full burden of behavioral disclosure. It only says 'Adds multiple emoji reactions' without mentioning permissions, error handling, rate limits, or whether reactions are applied atomically. For a mutating operation, this is insufficient.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, focused sentence with no superfluous content. It front-loads the action and resource clearly, making it efficient and easy to parse.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With no output schema, no annotations, and no parameter explanations, the description is too minimal for an agent to fully understand the tool's behavior. It lacks details on invocation constraints, expected inputs, and potential failure modes, making it incomplete for a mutation tool.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema has 0% coverage in the description, and the description does not explain the parameters channelId, messageId, or emojis. While the names are somewhat self-explanatory, the description fails to clarify the format of emojis (e.g., unicode, custom ID) or the relationship between channelId and messageId.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's function: adding multiple emoji reactions to a Discord message at once. The verb 'Adds' and the resource 'Discord message' are specific, and 'multiple' and 'at once' distinguish it from the sibling discord_add_reaction.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies the tool is for adding multiple reactions simultaneously, which is useful, but it does not explicitly compare with alternatives like discord_add_reaction or state when to prefer this tool. No exclusions or specific contexts are given, so usage guidance is only implied.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries the full burden. It only states the action without disclosing behavioral details such as whether repeated reactions are idempotent, rate limits, or required permissions. This is a significant gap for a mutation tool.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single clear sentence with no unnecessary words. It is perfectly concise and front-loads the core purpose.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the simplicity of the tool, the description covers the basic action but lacks any context about alternatives, prerequisites, or edge cases. The presence of sibling tools like remove_reaction and add_multiple_reactions makes the lack of usage guidance more impactful. Overall, it is minimally viable but incomplete.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, and the description does not explain the parameters beyond the action. It references 'emoji' but does not clarify the format (e.g., Unicode or custom emoji ID) or the roles of channelId and messageId, leaving the agent to infer from names.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('Adds') and the specific resource ('emoji reaction to a specific Discord message'). It distinguishes from the sibling 'discord_add_multiple_reactions' by using singular 'an emoji reaction', though it does not explicitly name the alternative.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives such as discord_add_multiple_reactions or discord_remove_reaction. It also does not mention prerequisites like requiring a prior login via discord_login.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of behavioral disclosure. It only states the action 'creates' without mentioning permissions, reversibility, potential side effects, or return behavior. This is insufficient for a mutating operation.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single sentence with no redundant or filler words. It is extremely concise and easy to parse, making it efficient for an agent to read.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The description is too minimal for a tool with four parameters and no output schema or annotations. It omits important context such as parameter meanings, expected behavior, and any constraints, making the tool difficult to use correctly without external knowledge.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The schema has zero descriptions for its four parameters, and the tool description explains none of them. It does not compensate for the 0% schema coverage, leaving the semantics of 'reason' and 'position' ambiguous and failing to aid correct invocation.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description 'Creates a new category in a Discord server' clearly specifies the action (creates) and the target resource (category in Discord server). This distinguishes it from sibling tools like edit/delete category and create text channel.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

There is no guidance on when to use this tool versus alternatives, nor any mention of prerequisites, exclusions, or related tools. The description simply states what the tool does, which implies usage but does not explicitly direct the agent.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries the full burden of behavioral disclosure. It states the action but does not mention required permissions, authentication, potential side effects (e.g., making the post visible to members), or failure scenarios. This is a significant gap for a mutation tool.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, concise sentence that conveys the core purpose without superfluous words. It is well-structured and front-loaded with the key information.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The tool has 4 parameters, no output schema, and no annotations, yet the description is only a short clause. It omits important contextual details such as return behavior, error conditions, and prerequisites, making it insufficient for a complete agent understanding.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema has 4 parameters with 0% description coverage, and the description only adds 'optional tags', which confirms tags is optional but leaves forumChannelId, title, and content semantically unexplained. The description adds minimal value beyond the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('Creates'), the resource ('a new post in a Discord forum channel'), and the optional capability ('optional tags'). It distinguishes from sibling tools like discord_get_forum_post and discord_delete_forum_post by focusing on creation.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage through the verb 'creates' but provides no explicit guidance on when to choose this over alternatives like discord_reply_to_forum, nor any exclusions or prerequisites. The intended context is inferable but not spelled out.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the full burden of disclosing behavior. It states the action but omits permissions required, potential failures (e.g., duplicate channel names), rate limits, or what the response contains. This is a significant gap for a mutation tool.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, direct sentence with no waste. It is front-loaded with the primary action and resource, making it easy to scan.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a creation tool with no annotations and no output schema, the description is insufficient. It does not explain what the tool returns, any required permissions, or error conditions. While the tool is simple, the absence of these details leaves the agent without critical operational context.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema has 0% description coverage, and the description adds little beyond the schema. It mentions 'optional topic', but that is already evident from the 'required' array in the schema. No additional meaning is provided for guildId or channelName.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool creates a new text channel in a Discord server, using a specific verb ('creates') and resource ('text channel'). It distinguishes itself from sibling tools like discord_create_category by specifying the channel type.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided about when to use this tool versus alternatives, nor does it mention any exclusions or prerequisites. The description only states what the tool does, not when to choose it.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the full burden of behavioral disclosure. It implies a mutating create operation but does not mention permissions, return values (e.g., webhook URL/ID), or whether the webhook is immediately usable.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single sentence with no filler and is front-loaded with the verb and object. However, it is slightly under-specified for the number of parameters, so it does not earn a perfect score.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a 4-parameter creation tool with no annotations and no output schema, this one-sentence description is inadequate. Missing return value details, parameter semantics, and usage context.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 0%, and the description only adds that the target is a Discord channel, providing minimal clarification for channelId. The 'name', 'avatar', and 'reason' parameters remain semantically unexplained.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly identifies the action ('Creates') and the resource ('a new webhook for a Discord channel'), making it easy to distinguish from sibling tools that edit, delete, or send webhook messages.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided on when to use this tool versus alternatives such as discord_edit_webhook or discord_send_webhook_message. It omits prerequisites like authentication or channel permissions.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the full burden of behavioral disclosure. It states the action and identifies the parameter, but it does not mention the irreversible nature of deletion, potential cascading effects on child channels, required permissions, or success/failure behavior. This is a significant gap for a destructive operation.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, front-loaded sentence that immediately conveys the core action and target. Every word is essential, and there is no redundancy or filler.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a destructive tool with no output schema and minimal annotations, this description is inadequate. It does not explain the consequences of deleting a category, the purpose of the 'reason' field, or any error conditions. Users are left without crucial context for a high-impact operation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description must clarify parameters. It only implies the role of 'categoryId' by saying 'by ID' but completely ignores the optional 'reason' parameter, leaving its purpose and format ambiguous.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('Deletes') and the specific resource ('Discord category') with an explicit identifier ('by ID'). It successfully distinguishes itself from sibling tools like discord_delete_channel, which target a different Discord entity.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No explicit guidance is given on when to use this tool versus alternatives such as discord_delete_channel. The description only implies that it is for deleting categories but does not mention exclusions, prerequisites, or scenarios where a different tool would be appropriate.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of behavioral disclosure. It states the action but omits consequences such as irreversibility, permission requirements, impact on messages or child objects, and rate limits. For a destructive operation, this is a significant transparency gap.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single concise sentence that directly states the action and the optional parameter. It is efficient and easily parsed, with no wasted words.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's simplicity (two parameters, no output schema), the description is minimally adequate but not complete. It lacks any discussion of side effects, permissions, or error scenarios, which are important for a destructive operation. It does not explain the return value or success indicators, but no output schema exists to compensate.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description must compensate. It mentions 'an optional reason' and implies channelId, but does not explain what each parameter is for (e.g., reason for audit logs) or expected formats. This adds minimal meaning beyond the parameter names.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('Deletes') and the resource ('a Discord channel'), which precisely distinguishes it from sibling tools like discord_delete_message and discord_delete_webhook. It also mentions the optional reason, adding a small scope detail.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided on when to use this tool versus alternatives. It does not mention prerequisites, exclusions, or scenarios where other delete tools should be preferred. The bare description leaves the agent to infer usage solely from the tool name.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the full burden of behavioral disclosure. It merely states the action and the optional reason, without mentioning permissions, irreversibility, side effects on replies, or error behavior. This adds little beyond the tool name.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, front-loaded sentence that directly states the action and the optional parameter. Every word is essential, with no redundant information or unnecessary elaboration.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the destructive nature of deletion, the lack of annotations, and the absence of an output schema, the description should at least note irreversibility, required permissions, or what happens to related content. The current description is too sparse to fully inform an agent.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The schema has 0% description coverage, so the description must compensate. It mentions the 'optional reason' but does not explain its purpose or usage. The threadId parameter is not described beyond being required, which is already evident from the schema. Minimal added meaning.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses the specific verb 'Deletes' and identifies the resource as 'forum post or thread', clearly distinguishing it from sibling deletion tools like discord_delete_category, discord_delete_channel, and discord_delete_message. However, it does not explicitly differentiate from alternatives, so it falls short of a perfect score.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided on when to use this tool versus alternatives such as discord_delete_message or discord_delete_channel. The description lacks any context about preferred scenarios, prerequisites, or exclusions.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries full responsibility for disclosing behavior. It only states the action ('Deletes') without mentioning irreversibility, permissions, error handling, or side effects. The agent is not informed that deletion is permanent or what happens if the message does not exist.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single sentence with no wasted words. It is front-loaded with the verb and provides the essential information in a concise, well-structured format.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The tool is simple, but the description lacks necessary context for an agent to make a fully informed choice. It does not address alternative delete tools, behavioral implications, or parameter usage, leaving gaps that a richer description should fill.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema has 0% description coverage, so the description must compensate. It implies the need for channelId and messageId via 'text channel' and 'specific message', but does not explicitly name them or explain the optional 'reason' parameter. This adds minimal meaning beyond the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a specific verb ('Deletes') and resource ('a specific message from a Discord text channel'), clearly distinguishing it from sibling delete tools for categories, channels, and forum posts. The purpose is unambiguous.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided about when to use this tool versus alternatives, such as deleting an entire channel or a forum post. There is no mention of prerequisites, permissions, or exclusion conditions, leaving the agent to infer usage from context.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

The description does not disclose any behavioral traits such as irreversibility, required permissions, or side effects. With no annotations provided, the description carries the full burden but fails to warn that deletion is permanent or that a webhook token may be required.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single concise sentence with no superfluous words. It efficiently states the core action without waste, making it appropriately sized.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The tool is destructive, has three parameters, zero schema descriptions, and no output schema or annotations. The description omits parameter purposes, irreversibility, authentication requirements, and any usage context, making it inadequate for a complete understanding.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, and the description adds no information about the parameters. It does not explain the purpose or format of webhookToken or reason, nor does it clarify which identifier is required. The description does not compensate for the missing schema descriptions.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's specific action: 'Deletes an existing webhook for a Discord channel.' It uses the verb 'deletes' with a specific resource, distinguishing it from siblings like discord_create_webhook and discord_edit_webhook.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives like discord_edit_webhook or discord_send_webhook_message. It only states the action without any context or exclusions, leaving the agent without direction.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries full burden for behavioral disclosure. It only says 'edits' without detailing required permissions, side effects, error behavior, or what happens if the category does not exist. This is insufficient for a mutation tool.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single sentence with no filler. Every word adds value, front-loading the action and resource immediately.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The tool has 4 parameters, no annotations, and no output schema, yet the description is minimal. It lacks details about optionality, update semantics, return values, and failure modes, making it incomplete for reliable invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The description only mentions 'name and position', leaving 'categoryId' and 'reason' unexplained. Given the schema has 0% coverage, the description fails to clarify the purpose of 'reason' or the semantics of 'position'. It partially compensates but not adequately.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses a specific verb 'Edits' with a clear resource 'Discord category' and specifies the editable fields 'name and position'. This clearly distinguishes it from sibling tools like create_category and delete_category.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies the tool is for modifying existing categories but does not explicitly state when to use it versus create/delete or mention any prerequisites. It provides minimal guidance but is not misleading.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description must disclose behavioral traits but does not. It merely states 'Edits an existing webhook' with no mention of side effects, required permissions, reversibility, or what happens to the webhook configuration. This is a significant transparency gap for a mutation tool.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, front-loaded sentence with no wasted words. It is concise and grammatically clear, but the lack of any additional structure (e.g., parameter hints) makes it less helpful than its brevity might suggest.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a tool with six parameters, no annotations, and no output schema, the description provides almost no context. It does not explain return values, error conditions, or parameter relationships, making it inadequate for an agent to invoke the tool correctly in diverse contexts.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, and the description does not mention any of the six parameters (name, avatar, reason, channelId, webhookToken). The agent receives no semantic context for the parameters beyond their names, which is insufficient for correct invocation.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses the specific verb 'Edits' and clearly identifies the resource as 'an existing webhook for a Discord channel.' This distinguishes it from sibling tools like discord_create_webhook and discord_delete_webhook, making the purpose unambiguous.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives such as discord_create_webhook or discord_send_webhook_message. It does not mention prerequisites, typical use cases, or exclude scenarios, leaving the agent without decision support.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full transparency burden. It discloses the base64 return format and iterative scaling to fit token limits, which adds useful behavioral context. However, it does not mention error behavior, authentication needs, or non-destructive nature, leaving some gaps.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two sentences, front-loaded with the core purpose and immediately followed by a key behavioral detail. Every word earns its place with no redundancy.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the simple parameter set and lack of output schema, the description sufficiently covers the tool's action, behavior, and return format. It lacks error-case details, but for a straightforward fetch operation, it is complete enough.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, with both 'url' and 'maxSizeKB' already explained in the schema. The description adds no additional parameter-level meaning beyond hinting at scaling via the max size parameter, so the schema does the heavy lifting.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses a specific verb ('Fetch') and resource ('image from Discord CDN'), clearly stating the action and output format (base64). This distinguishes it from sibling tools, none of which handle image fetching.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage for retrieving Discord CDN images but does not explicitly state when to use it versus alternatives or provide exclusions. Siblings do not overlap functionally, so the intended context is somewhat implied but not directly guided.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the full burden. It accurately conveys the read-only nature ('Lists') and the scope, but it does not disclose return format, authentication requirements, or potential errors. The description is adequate but lacks extra behavioral context.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, front-loaded sentence with no fluff. It immediately states the action and object, making it efficient and easy to parse.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The tool is simple with one parameter, and the description covers purpose and scope well. However, with no output schema or annotations, it does not describe return values or any prerequisites (e.g., login), leaving a small but notable gap.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema has 0% description coverage, but the description compensates by clarifying that 'guildId' refers to 'a specified Discord server (guild)'. This adds meaning beyond the parameter name and helps agents understand the expected value, though it doesn't specify format or how to obtain the ID.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a specific action ('Lists') on a clear resource ('forum channels') with a defined scope ('in a specified Discord server (guild)'). This clearly distinguishes it from sibling tools like discord_get_forum_post (which retrieves a single post) and discord_list_servers (which lists servers, not channels).

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides clear context for when to use the tool: whenever all forum channels in a guild are needed. However, it does not explicitly mention exclusions or alternatives (e.g., use discord_get_forum_post for a specific post), but the context is unambiguous enough for an agent to select appropriately.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries full burden. It only states the purpose and does not disclose any behavioral traits such as permissions, side effects, error handling, or return format specifics.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, front-loaded sentence with no filler. Every word contributes to conveying the tool's function.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The tool is simple (one param, no output schema), and the description gives a high-level return overview ('details... including its messages'). However, it lacks parameter mapping and any mention of response structure or error conditions, leaving notable gaps.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, and the description does not mention the threadId parameter at all. It fails to add any meaning beyond the bare schema field name 'threadId'.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

Description uses specific verb 'retrieves' and resource 'forum post', and clarifies it includes messages. This clearly distinguishes it from sibling tools like discord_get_forum_channels (which lists channels) and discord_read_messages (which reads general messages).

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use this tool vs alternatives. It doesn't mention scenarios, exclusions, or alternatives, so the agent receives no contextual decision support.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries the full burden. It only states 'retrieves detailed information' without revealing the response format, error behavior, or permission requirements. The verb 'retrieves' implies read-only, but no further behavioral context is added.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single sentence that immediately states the tool's action, with no filler or repetition. Every word contributes to the purpose.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The description mentions two output elements (channels, member count) but calls the result 'detailed information' without further structure. There is no output schema, so the agent cannot anticipate the full return value, and prerequisites such as bot membership are not mentioned. For a simple one-parameter read, this is adequate but has clear gaps.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The schema has zero description for `guildId`, and the tool description does not explain that this ID is the Discord server ID or how to find it. With 0% schema coverage, the description fails to compensate, leaving the sole parameter ambiguous for an agent.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses the specific verb 'retrieves' and identifies the resource as a 'Discord server', with concrete examples ('channels and member count'). This clearly differentiates it from siblings like discord_list_servers, which lists servers, and discord_get_forum_channels, which targets a specific channel type.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided about when to use this tool versus alternatives. It does not mention discord_list_servers for discovering server IDs, nor does it note any prerequisites or exclusion criteria, leaving the agent without decision support.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries full responsibility. It only states what it does without disclosing return format, authentication requirements, or any side effects. The description adds no behavioral insight beyond the tool name itself.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single sentence with no redundant words. It is appropriately sized and front-loaded, containing exactly the necessary information.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With no output schema and no annotations, the description should at least indicate what data is returned (e.g., server names/IDs) and any prerequisites like login. It lacks these details, but for a simple list operation, the description is minimally viable.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The tool has zero parameters, so the baseline is 4. The description does not need to explain parameters, as none exist. The schema is trivially fully covered.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses a specific verb ('Lists') and a clear resource ('all Discord servers the bot is a member of'). It distinguishes itself from sibling tools like discord_get_server_info, which focuses on a single server, by indicating a comprehensive enumeration.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No explicit when-to-use or alternative guidance is given. However, the purpose is self-evident, implying the tool is for enumerating servers. There is no mention of exclusions or alternatives, so it falls at 'implied usage'.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are present, and the description does not disclose behavioral traits such as side effects, session persistence, idempotency, or error behavior. It merely states 'logs in' without explaining what that entails.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, front-loaded sentence with no redundant words. It conveys the essential action and resource efficiently.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The tool is login-related and has no output schema, so the description should explain what success/failure looks like and whether the login persists. It does neither, leaving the agent with ambiguity about the tool's full behavior.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description must compensate. It references 'the configured token' but does not clarify the role of the optional 'token' parameter—whether it overrides a default, is required for login, or has any constraints.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('Logs in') and resource ('Discord'), and specifies it uses a token. This distinguishes it from the sibling tools, which perform content creation, editing, or messaging operations.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided on when to use this tool versus alternatives, or that it likely must precede other Discord operations. The description does not mention any exclusions or preconditions.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description must disclose behavioral traits. It only states the core action and a parameter, but doesn't mention ordering, return format, rate limits, or read-only status. For a read operation, it's likely safe, but the description doesn't explicitly confirm.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, concise sentence that gets straight to the point. It's appropriately sized with no filler.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With no output schema or annotations, the description is the only source of context. It explains the core purpose, but lacks detail on return shape, ordering, and any limitations. For a 2-param tool this is insufficient guidance for an agent to confidently invoke the tool and interpret the result.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema already defines limit with constraints and channelId as a string, but neither has descriptions (0% coverage). The description only references a 'configurable limit' without explaining it represents message count or that channelId identifies the target channel. It adds minimal value over the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses the specific verb 'Retrieves' with a clear resource 'Discord text channel', and the 'configurable limit' adds scope. It distinguishes from siblings like discord_send and discord_delete_message, and while a search tool exists, this explicitly indicates a simple retrieval without filtering.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage for reading messages from a channel, which is clear context. However, it doesn't explicitly mention alternatives or when to prefer this over discord_search_messages, so it falls short of the top tier.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the full burden of behavioral disclosure. It only states the core action without explaining important behaviors such as whether it can remove reactions from other users, what happens if the reaction does not exist, or whether special permissions are required. The optional 'userId' parameter's role in removing others' reactions is not disclosed.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, clear sentence with no wasted words. It is front-loaded with the verb 'Removes' and immediately specifies the resource. It is appropriately concise for a simple operation.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The tool has no output schema and no annotations, yet the description provides no additional context about return values, error handling, permissions, or edge cases. The optional 'userId' parameter is left unexplained, making the description incomplete for a tool with four parameters and zero schema documentation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The schema has 0% description coverage, and the description itself provides no parameter explanations. It does not clarify the meaning of 'channelId', 'messageId', 'emoji', or especially the optional 'userId'. The description adds no value beyond the parameter names, leaving all four parameters semantically undocumented.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('Removes') and the resource ('a specific emoji reaction from a Discord message'). It distinguishes itself from sibling tools like discord_add_reaction and discord_delete_message by specifying the precise operation of removing a single reaction.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies when to use this tool (when a specific emoji reaction needs to be removed), but it does not provide explicit alternatives or exclusions. There is no mention of when not to use it, such as when removing all reactions or when needing to delete the entire message, which would be handled by sibling tools.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description must disclose behavioral traits. It states 'Adds a reply' which indicates a mutation, but it does not clarify authentication requirements, side effects, return values, or behavior for invalid thread IDs. The brief description leaves ambiguity about whether this posts a new message in the thread or uses Discord's reply feature.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single concise sentence, front-loaded with the verb and object, with no redundant information.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's simplicity (2 params, no output schema), the description is minimal but lacks essential context such as prerequisites (login, valid thread), return value, and any behavioral nuances. It is not complete enough for an agent to confidently invoke without additional context.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0% and the description does not mention the 'message' or 'threadId' parameters. The parameter names are somewhat self-explanatory, but the description adds no explicit meaning beyond what the schema provides. It fails the requirement to compensate for low schema coverage.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses a specific verb 'Adds' and resource 'reply to an existing forum post or thread', clearly distinguishing it from sibling tools like create_forum_post (creates new) and send (sends to a channel). It unambiguously states the action and target.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use vs alternatives, no prerequisites or exclusions. The description implies usage for replying to existing threads but does not mention alternatives or when not to use.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description must carry the full burden of disclosing behavior. It only says 'searches for messages' without explaining return format, pagination behavior, or any nuances like rate limits or search syntax. This is insufficient for a tool with 14 parameters and no output schema.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, short sentence with no extraneous words. It is front-loaded with the core idea. While it lacks depth, it is highly concise and does not waste any text, meeting the standard for a concise description.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

This tool has 14 parameters, a required guildId, and no output schema. The description gives almost no contextual guidance on how the search operates, what results look like, or how pagination/filters work. Despite rich schema descriptions, the tool is under-specified from a usage and completion standpoint, so a 2 is appropriate.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the baseline is 3. The description adds no parameter-level meaning beyond what the schema already provides; it doesn't comment on how filters like 'content', 'authorId', or 'pinned' combine or influence the search. Thus it earns the baseline, not more.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action (searches) and resource (messages in a Discord server). It is specific enough about the operation, but does not differentiate from sibling tools like discord_read_messages, nor does it mention the various filtering capabilities. So it lacks the scope detail needed for a 5.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided on when to use this tool instead of alternatives such as discord_read_messages. The description does not indicate scenarios (e.g., searching by content, author, or filters) that favor this tool, nor does it mention exclusions or prerequisites beyond the schema's required guildId.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description must convey the tool's behavioral profile. It clearly states the primary mutation (sending a message) and the optional reply action. However, it omits any detail about prerequisites (e.g., authentication via discord_login), failure modes for invalid channel IDs, or potential rate limits. The description covers the core effect but not the full operational context.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two concise sentences with no redundant wording. It front-loads the primary action and then adds the optional reply behavior. Every word contributes to understanding the tool's function.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a three-parameter, no-output-schema tool, the description covers the main functionality and all parameters well. It lacks any mention of the return value or error handling, but these are secondary for a simple send operation. The description is sufficiently complete for the tool's complexity, though a note about response format would push it to 5.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Although the input schema has no descriptions, the tool description effectively explains all three parameters: 'specified Discord text channel' maps to channelId, 'message' is the content, and 'providing its message ID' clarifies replyToMessageId. This fully compensates for the 0% schema coverage and adds clear meaning beyond the raw property names.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly identifies the verb (sends) and the resource (a message to a specified Discord text channel). It also mentions the optional reply feature, which differentiates it from sibling tools like discord_send_webhook_message or discord_create_forum_post. The purpose is unambiguous and specific.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage: it is for sending messages to text channels and optionally replying to existing messages. However, it does not explicitly state when to use this tool versus alternatives such as webhooks or forum posts. There is no exclusion or comparison to siblings, leaving the agent to infer the appropriate context.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description must disclose behavior itself. It states the conversion to speech and attachment of audio, but omits details like authentication requirements, rate limits, or failure behavior, making it adequate but not comprehensive.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Two concise sentences front-load the core purpose and explain the mechanism, with no redundant information.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given no output schema and no annotations, the description covers the main action but lacks details on response format, prerequisites, or edge cases. It's sufficient for a simple operation but could be more complete.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

All parameters have descriptions in the schema (100% coverage), so the tool description doesn't need to add parameter details. It adds marginal value by explaining the text-to-speech process, earning the baseline 3.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses a specific verb ('Sends') and identifies the resource ('voice message to a Discord channel') and method ('using ElevenLabs TTS'), which clearly distinguishes it from sibling text-sending tools like discord_send.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description makes clear the context for use—sending voice messages rather than text—but does not explicitly mention when not to use it or name alternatives, which is a minor gap.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries the full burden for behavioral disclosure. It states the primary effect (sending a message) but gives no additional context about side effects, required permissions, error behavior, or irreversibility, which are relevant for a create-type action.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single concise sentence that immediately conveys the tool's purpose. Every word contributes, and it is not bloated or repetitive.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a tool with six parameters and no output schema or annotations, this description is too thin. It omits guidance on optional parameters, return behavior, failure cases, and validation, which are necessary for an agent to use the tool confidently in varied contexts.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

With 0% schema description coverage, the description must compensate, but it only weakly maps 'message' to content and 'webhook' to webhookId/webhookToken. It provides no explanation for threadId, username, or avatarURL, leaving their purpose unclear.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description starts with a specific verb 'Sends' and clearly identifies the resource as 'a message to a Discord channel'. The qualifier 'using a webhook' differentiates it from sibling tools like discord_send, which likely sends via a bot session, and discord_send_voice, which handles voice.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

Usage is implied by 'using a webhook', suggesting it should be used when webhook credentials are available. However, it does not explicitly state when to prefer this over alternatives such as discord_send, nor does it mention prerequisites or exclusions.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.