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

With no annotations, the description must carry all behavioral context, but it only says the body is discarded. It does not disclose HTTP method, failure behavior, side effects, rate limits, or what is returned on non-2xx responses.

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 free of fluff, but it is more of a fragment than a structured tool description. It lacks sections or context, though the two sentences it has are not redundant.

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 9 parameters and no output schema, but the description only provides a vague one-line purpose. It does not specify the return format, error behavior, or relationship to dozens of sibling tools, so an agent cannot reliably determine invocation parameters or interpret results.

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?

All 9 parameters have descriptions, but many are unrelated to the stated purpose (city, feed, timezone) or explicitly say they are discarded after checks. The description does not explain which parameters are actually used, how they combine, or whether any are required.

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?

Description states the tool returns HTTP status for a URL, but 'public library docs URL' is ambiguous and the expected output (status code? status text?) is not explicit. It does not clearly distinguish this from sibling status tools such as fetch-status or status-catalog.

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 call this tool versus sibling tools like fetch-status, browser-url-ok, normalize-url, or status-catalog. There are no prerequisites, constraints, or examples.

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