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 lists action names without explaining side effects, state changes, prerequisites, or return values. For example, it does not state that 'close' terminates the browser session or that 'pdf' generates a file.

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 concise and front-loaded with a clear purpose statement. The action list is efficient, though it is presented as an unformatted run-on list that could be better organized into groups or categories.

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 complexity (13 parameters, multiple actions, no output schema), the description is minimal and incomplete. It does not explain how actions relate to parameters, expected outcomes, or operational requirements, making it insufficient for an agent to use the tool correctly.

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 100%, so the parameter descriptions already document each field's meaning. The description adds little beyond the schema, mainly repeating action names already present in the 'action' parameter description. It does not map actions to required parameters.

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 'Control a web browser' and lists the available actions, which distinguishes it from sibling tools like web_search and web_fetch. However, it does not explain what each action does in detail, so it is clear but not deeply 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 provides no guidance on when to use this tool versus alternatives like web_fetch or web_search. It does not mention prerequisites, exclusions, or scenarios where one tool would be preferred over another.

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 behavioral traits. It only lists action names without explaining side effects, safety (e.g., eval executes JavaScript), or response behavior. This is a significant gap for a multi-action 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, front-loaded with the resource and action list. It is succinct without waste, though it sacrifices explanatory value for brevity.

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 is a complex tool with 8 parameters, 7 actions, and no output schema. The description is severely incomplete—it doesn't explain action behaviors, parameter combinations, or return values, making it inadequate for an agent to use correctly.

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 100%, with each parameter having a description, so the baseline is 3. The description adds no parameter meaning beyond what the schema provides, merely repeating the action list already present in the schema's action property.

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 identifies the resource (Canvas visual workspace) and provides a list of actions, but 'Control' is generic and doesn't clarify what the workspace is or how it relates to sibling tools like browser. It lists actions but gives no detail on what each does, making it hard to distinguish from alternatives.

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 versus browser, web_fetch, or others. There are no exclusions, prerequisites, or context signals indicating the intended use case, leaving the agent to infer 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 provided, so the description carries the full burden. It discloses no auth needs, side effects of sending, failure modes, or per-action behaviors. Irreversible operations like send/react are not flagged.

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 front-loads the verb and resource, then lists actions. It is compact with no fluff, though the action list slightly duplicates the schema's action enum.

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 13 parameters, 7 actions, no output schema, and no annotations, the description is far from complete. It fails to explain which parameters apply to each action, per-channel specifics, or return formats, leaving many gaps for the agent to navigate.

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% and all parameters have individual descriptions. The tool description repeats the action list already present in the action parameter but adds no new meaning or mapping of actions to parameters, so baseline 3 is appropriate.

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 identifies the resource (messages/channels) and the verbs (send, react, search, etc.), with explicit channel examples (Discord, Telegram, WhatsApp). It is clear enough to distinguish from web/browser tools, though 'perform channel actions' is broad.

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 on when to use this tool versus alternatives such as sessions_send. Implied usage for external messaging exists, but there are no exclusions, prerequisites, or comparison to 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?

With no annotations, the description carries the full burden of behavioral disclosure. It only says 'Analyze' without specifying whether the tool extracts text, downloads files, reads local paths, makes network requests, or returns structured output. No side effects, permissions, or output behavior are 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, well-structured sentence that front-loads the verb and resource. It contains no redundant or filler content, making it highly concise 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?

Given the tool has 6 parameters, no annotations, and no output schema, the one-line description is far from complete. It fails to explain what 'analyze' returns, how to use the 'model' or 'prompt' parameters, or how the tool behaves in practice. The agent is left to infer all usage context from parameter names and descriptions alone.

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 parameter schema provides descriptions for all 6 parameters, so the baseline is 3. The tool description does not add any parameter-specific meaning beyond what the schema already states; it merely mirrors the fact that inputs can be paths or URLs, which is already documented in 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 tool's purpose with a specific verb ('Analyze'), a well-defined resource ('PDF documents'), and a source qualifier ('from file paths or URLs'). It is instantly distinguishable from sibling tools like web_search and web_fetch, which are general-purpose and not PDF-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 offers no guidance on when to use this tool versus alternatives. It does not mention prerequisites, exclusions, or compare with related tools such as web_fetch or browser for fetching PDFs from URLs. The intended use case is implied but never explicitly stated.

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 discloses the action and identification requirement but omits the response/wait behavior enabled by 'timeoutSeconds' (e.g., whether it returns the other session's reply). This is a notable gap for a messaging 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 two concise sentences, front-loaded with the primary action and followed by an essential requirement. Every word adds value; 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?

The description adequately covers the core purpose and parameter constraints, but for a tool with no output schema or annotations, it should clarify response/wait behavior, especially given the 'timeoutSeconds' parameter. The absence of this detail leaves the agent uncertain about the tool's return value and blocking nature.

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?

While the schema already describes all parameters, the description adds crucial semantic information: 'Either sessionKey or label must be provided to identify the target session.' This is not reflected in the schema's required list, making it valuable beyond the structured data.

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: 'Send a message into another OpenClaw session' and explicitly mentions 'Use for agent-to-agent communication,' which distinguishes it from sibling tools like 'message' that likely target users.

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 gives clear context ('Use for agent-to-agent communication') and identifies a prerequisite (sessionKey or label required). It does not explicitly mention when not to use, but the stated use case is sufficiently directive.

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, and it does add noteworthy behavioral context: it explains that HTML is converted to markdown or text, implying content extraction rather than raw HTML delivery. However, it does not disclose error handling, redirects, or authentication concerns, leaving some behavioral 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 a single, front-loaded sentence that immediately communicates the tool's core function and output format transformation. Every element earns its place, with no redundant phrasing 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?

The tool is straightforward with a clear schema covering all four parameters, so the description is nearly sufficient. It explains the core transformation (HTML to markdown/text) and output nature (readable content), though it omits details like return value structure or failure modes. Given the simplicity and 100% schema coverage, this is a high degree of completeness.

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's mention of markdown/text conversion aligns with the extractMode parameter but adds no new details beyond what the schema already specifies. It does not elaborate on maxChars or sessionKey semantics, which the schema already covers.

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 specific action: 'Fetch and extract readable content from a URL', with explicit mention of HTML being converted to markdown or text. This distinguishes it from siblings like web_search (search) and browser (interactive), as it identifies a unique fetch-and-convert operation.

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 fetching web content, but offers no explicit when-to-use or when-not-to-use guidance, nor does it reference alternative tools. The context from sibling tool names (e.g., browser, web_search) could help an agent infer when this tool is appropriate, but the description itself does not provide that guidance.

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 carry the full burden of behavioral disclosure. It only says 'return results' without mentioning safety, result format, pagination, or any limitations, which is insufficient for a search 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 wasted words, but it is borderline under-specified. It states the core function without elaboration, which is concise but not richly informative.

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 8 parameters and lack of annotations and output schema, the description is clearly insufficient. It fails to explain search behavior, result structure, or filter usage, leaving significant gaps for 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?

Schema coverage is 100%, so the baseline is 3. The description adds no extra meaning about how parameters like count, country, or freshness affect results, relying entirely on 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 verb 'search' and the resource 'the web', clearly stating the core action. It distinguishes itself from sibling tools like web_fetch, which fetches specific URLs, though it doesn't explicitly name alternatives.

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 web_fetch or browser. There is no indication of suitable contexts or exclusions, leaving the agent without direction for tool selection.

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