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

With no annotations provided, the description carries the full behavioral disclosure burden. It does disclose a meaningful behavior: the body is discarded, so only the HTTP status is returned. However, it does not mention whether the operation is read-only, how redirects or errors are handled, or any network-level side effects, which leaves gaps for a network-touching tool.

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 two short sentences with no filler: the core purpose is front-loaded and the body-discarded caveat is a useful second sentence. It is concise and well structured, though arguably too terse for a tool with nine optional parameters.

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 nine optional parameters, no annotations, and no output schema, the description is too sparse to fully guide invocation. It does not state which parameters should be passed, what the HTTP status values mean, or how this tool differs from sibling status and shape-checking tools. The 'Body discarded' line helps, but the agent still has to infer a significant amount of invocation context.

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?

The schema descriptions cover 100% of the parameters, so the baseline is 3. The description adds the 'public library docs URL' scope, which helps select the url parameter, but it does not explain how the other eight optional parameters relate to the tool's purpose or which parameter combinations are valid. It does not significantly extend the schema's parameter semantics.

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 the HTTP status for a public library docs URL and that the body is discarded. This is a specific verb+resource combination. It does not explicitly differentiate from sibling tools like fetch-status or web-fetch, so it misses the top score.

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 implies the tool should be used when an agent needs the HTTP status of a public library docs URL. However, it provides no explicit when-not-to-use guidance and does not mention alternatives such as fetch-status, normalize-url, or web-fetch. Usage is conveyed only implicitly through the stated purpose.

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