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

The description discloses one important behavior: the response body is discarded, so callers should expect only a status code. However, with no annotations, it does not mention whether this makes a network request, how redirects/errors/timeouts are handled, or whether any authentication or rate limits apply.

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?

Two short sentences with no filler; the core status-check behavior is front-loaded and 'Body discarded' is a useful qualifier. The description earns its length.

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 optional parameters, no required fields, no output schema, and no annotations, yet the description explains only a narrow URL-status use case. It never explains how parameters relate, what the return value looks like beyond 'HTTP status', or how this tool differs from sibling URL/status tools.

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?

Input schema coverage is 100%, so the schema already documents all nine parameters. The description adds no parameter-level meaning beyond the schema, though 'Body discarded' loosely aligns with the schema's repeated 'discarded after...' notes. Baseline 3 is appropriate.

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 specific operation—checking the HTTP status of a public library docs URL—and explicitly notes the body is discarded. This is clear enough to distinguish it from body-returning tools like web-fetch, but it doesn't name or contrast with the closest siblings such as 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?

No guidance is given about when to prefer this tool over fetch-status, browser-url-ok, or web-fetch. The 'public library docs URL' scope is an implicit hint, but there are no explicit when-to-use, when-not-to-use, or alternative-selection conditions.

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