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

Annotations already declare readOnlyHint=true, openWorldHint=true, idempotentHint=true, and destructiveHint=false, covering the safety profile. The description adds context that it returns a credential setup schema and supports API key or token credentials. However, it does not disclose any further behavioral details such as what the schema structure looks like or any prerequisites, so the added value beyond annotations is limited.

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 core action ('Get the credential setup schema') and includes only relevant details (platform and credential types). Every word earns its place, with no fluff or repetition.

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 zero parameters and no output schema, the description fully captures the tool's purpose and scope. It clearly distinguishes that this is a schema retrieval action, not the actual connection process, and specifies the credential types. No further information is necessary for an agent to invoke it 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?

The input schema is empty (0 parameters), so schema coverage is trivially 100%. The description adds meaningful context by explaining that the tool returns a schema for setting up credentials using API key or token, which clarifies the tool's purpose despite having no parameters. This aligns with the baseline of 4 for zero-parameter tools.

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: 'Get the credential setup schema to connect DEV.to'. It uses a specific verb ('Get') and resource ('credential setup schema'), and distinguishes itself from sibling connect_* tools by naming the specific platform (DEV.to) and the credential types (API key or token).

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: this tool is for retrieving the credential schema needed to connect DEV.to. While it doesn't explicitly exclude alternative tools, the platform-specific naming (DEV.to) among many connect_* siblings makes the intended usage unambiguous. No exclusions or when-not guidance are given, but the context is sufficient.

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