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

With no annotations, the description carries the behavioral burden, and 'Body discarded' is a useful, non-obvious disclosure that the response will not include page content. However, it does not disclose whether a network request is made, error behavior, or how the many unrelated schema parameters are treated.

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, front-loaded sentences with no filler; both statements carry useful information. It is somewhat too terse for the nine-parameter schema, hence not a 5, but it is not verbose or poorly structured.

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 nine optional parameters, no annotations, and no output schema, the description is incomplete. It does not explain which parameter to populate, that other fields are ignored/discarded, or what form the HTTP status result takes, so an agent cannot reliably construct a call.

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 has 100% description coverage, so the baseline is 3. Each parameter is individually described with discard behavior, but the tool description itself adds no parameter guidance and does not indicate that 'url' is the intended parameter for this tool.

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 tool returns an HTTP status for a public library docs URL, which conveys the core operation. It does not distinguish this tool from sibling URL/status tools such as fetch-status or browser-url-ok, so it misses the sibling-differentiation component of a 5.

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 on when to use this tool versus alternatives like fetch-status, normalize-url, or browser-url-ok. The description does not mention conditions, exclusions, or which URL types qualify, leaving the agent to guess.

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