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

With no annotations, the description carries the full burden of disclosing side effects and edge cases, but it only mentions that the body is discarded. It does not disclose whether the tool makes network requests, follows redirects, ignores the many unrelated parameters, or has any rate limits or auth requirements.

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 a single, front-loaded sentence with no filler words. It communicates the core action and a key output trait efficiently.

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 tool has nine optional parameters and no output schema, the two-sentence description leaves too much unexplained. It does not clarify why the other parameters exist, which one is the docs URL, or what a 'hint' result looks like beyond HTTP status.

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 nine parameters have individual schema descriptions, giving 100% schema coverage and a baseline of 3. However, the tool description itself adds no parameter-level meaning, and several schema descriptions (e.g., 'discarded after the shape check') are cryptic without further context.

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 that the tool returns an HTTP status for a public library docs URL and that the body is discarded, which distinguishes it from body-fetching tools like web-fetch. However, it does not specify which input parameter is the actual URL, 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?

The description gives no guidance on when to use this tool over similar siblings such as fetch-status, browser-url-ok, or web-fetch. It also does not mention any conditions or limitations for its use.

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