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

With no annotations, the description must disclose behavior itself. It mentions that the body is discarded, but it does not state whether the tool performs a network request, requires authentication, has rate limits, or is read-only.

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 front-loads the main purpose. It wastes no words, though it could be more explicit about the parameter mapping.

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?

Given the lack of an output schema and annotations, the description should explain what the caller provides, what exact output is returned (e.g., status code only), and how to handle failures. It currently leaves most of this unspecified and the many unrelated parameters add confusion.

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 the schema describes 100% of the parameters, the descriptions are templated or unrelated to the stated purpose (e.g., 'url' is described as 'normalize or cite', not as a status-check target). The tool description does not explain which of the nine optional parameters are relevant or how they map to the HTTP status behavior.

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 that the tool returns an HTTP status for a public library docs URL and that the body is discarded, giving a clear outcome. However, it does not explicitly distinguish this from sibling tools like fetch-status or web-fetch and 'public library docs' is somewhat 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?

There is no guidance about when to use this tool instead of alternatives such as fetch-status, browser-url-ok, or web-fetch. The body-discarded note is the only hint that it is not for retrieving content, but no explicit usage conditions are provided.

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