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

The description discloses that the body is discarded and path access is absent, but it does not state the return format, failure behavior, network side effects, or whether any parameter actually triggers a request. This leaves important behavioral expectations unspecified.

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 very short, front-loaded, and contains no unnecessary words. The brevity is a positive, though it comes at the cost of clarity.

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 nine optional parameters, no required fields, no output schema, and no usage context, this description is fundamentally incomplete. An agent cannot determine which parameter to provide, what the response will look like, or why this tool exists alongside similar siblings.

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 every parameter has a schema description, many are self-defeating ('discarded after the shape check', 'discarded after the length check') and do not explain how they contribute to the tool's stated purpose. The main description does not map parameters to behavior, so the agent cannot reliably decide which fields are relevant.

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 says 'HTTP status for a public library docs URL' but does not clarify what 'lib-docs-hint' actually returns or how it relates to the nine unrelated optional parameters. It is not clearly distinguished from sibling tools like fetch-status or normalize-url.

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 for when to use this tool versus alternatives, nor are any conditions or exclusions given. The description implies a narrow docs-URL use case, but the broad parameter list makes the intended usage unclear.

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