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

With no annotations, the description carries the full behavioral disclosure burden. It usefully states that the body is discarded and only an HTTP status is returned, but it does not mention request method, redirect handling, error behavior, rate limits, or auth expectations.

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 main behavior and the key body-discarding detail are front-loaded and easy to parse.

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 9 parameters, no annotations, and no output schema, the description is too thin. It does not explain which parameter drives the library-docs check, what the returned status looks like, or why many schema fields appear unrelated to the stated purpose.

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?

Schema descriptions cover all 9 parameters, most with explicit 'discarded' notes, so the schema carries most of the parameter-level meaning. The tool description adds the HTTP-status intent but does not clarify how the 'docs URL' purpose relates to unrelated parameters such as city, zone, or query.

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 says the tool reports an HTTP status for a public library docs URL and discards the body, so an agent knows the core behavior. It does not explicitly differentiate this from sibling URL/status tools like fetch-status or browser-url-ok, and the broad 9-parameter schema makes the intended scope less crisp.

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 phrase 'for a public library docs URL' implies when to use it, but there are no explicit conditions, exclusions, or references to alternative tools. An agent has to infer which sibling tool is preferred for generic URL checks versus library-docs checks.

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