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

With no annotations, the description carries the full behavioral transparency burden. It discloses that the body is discarded, but it does not describe the HTTP method, status/error behavior, how the other eight parameters are handled, or what happens when none are supplied.

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 compact and front-loaded: two short sentences, no filler. The body-discarded detail is useful and earns its place.

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 nine optional parameters, no annotations, and no output schema, this is far from complete. It does not explain how the other parameters are used, what format the status is returned in, or how an agent should decide which parameter to pass.

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 a small amount of meaning to the url parameter, but it does not help the agent understand the purpose or role of the many unrelated optional parameters such as city, zone, feed, or json.

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 a concrete action and resource: return an HTTP status for a public library docs URL while discarding the body. It is not a tautology, and the 'body discarded' detail helps separate it from a full fetch tool, though it does not explicitly contrast itself with siblings like fetch-status or browser-url-ok.

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 instead of fetch-status, web-fetch, normalize-url, or browser-url-ok. The statement 'body discarded' hints the body is not needed, but no conditions, exclusions, or alternative tools are named.

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