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

With no annotations, the description carries the full transparency burden. It discloses that only status is returned and the body is discarded, but it does not mention network behavior, redirects, errors, or side effects.

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 concise and front-loaded; both sentences contribute. However, it is so terse that it leaves the noisy parameter list unexplained, though the text brevity itself is not a problem.

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 confusing 9-parameter schema and no output schema, the description is insufficient: it doesn't say which parameter is actually used, what exact status information is returned, or how errors are reported. The 'body discarded' detail is the only contextual hint.

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 lists 9 optional string parameters, but their descriptions are mostly unrelated to checking HTTP status, e.g., 'city', 'feed', 'json', and 'zone', or explicitly say they are 'discarded'. The only relevant parameter, url, is described as 'normalize or cite', not as the target of an HTTP status check, so the input contract is misleading.

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 the action (check HTTP status) and resource (public library docs URL), and explicitly says the body is discarded, so the primary purpose is understandable despite having no output schema.

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?

Usage is implied by the purpose: use when you need the HTTP status of a library docs URL. It does not distinguish this from sibling tools like fetch-status, browser-url-ok, or web-fetch, nor does it mention when not to use it.

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