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, but it only reveals that the body is discarded. It does not mention whether the tool follows redirects, requires authentication, makes a network request, or how the many unrelated input fields are handled.

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 short, front-loaded, and free of filler. It is efficient, though it achieves conciseness by omitting important details.

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 has nine parameters, no annotations, and no output schema, yet the description only mentions a URL and body discarding. It does not specify which parameter to supply, what the returned status looks like, or how the unrelated optional fields such as city, json, and query relate to the tool's behavior.

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 each parameter already has a description, which establishes a baseline of 3. The description adds no parameter-level detail and does not clarify which of the several URL-like fields (url, host, feed, path) should be used for the library docs URL.

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: return the HTTP status for a public library docs URL while discarding the body. However, the qualifier 'public library docs URL' is somewhat ambiguous and the description does not differentiate this tool from siblings like fetch-status or web-fetch.

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 about when to use this tool versus related tools such as fetch-status, browser-url-ok, or web-fetch. The single sentence provides no context, exclusions, or alternatives.

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