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

The description discloses that the body is discarded, and parameter descriptions mention side-effect-free behaviors like 'no disk access' and 'discarded after'. However, there is no annotation, no mention of errors, output format, or side effects beyond HTTP status retrieval.

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 and contains no fluff. It could be more informative, but it is concise and every word contributes to the stated 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?

With nine optional parameters, no required parameters, no output schema, and no annotations, the description is far too incomplete. The agent cannot determine which inputs are relevant, what the full output will be, or how it differs from closely related sibling tools.

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?

Each parameter has a description, but most are unrelated to the stated purpose of checking HTTP status for a library docs URL (e.g., city, feed, json, zone, query). The schema does not clarify which parameter should be passed for the intended operation, and the mismatch undermines the parameter 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 states a clear action and resource: returning HTTP status for a public library docs URL. However, the name 'lib-docs-hint' and the broad, unrelated parameter schema make the actual intended use ambiguous.

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 given about when to use this tool versus siblings like fetch-status, browser-url-ok, playwright-url-ok, or web-fetch. The description does not mention alternatives or selection criteria.

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