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

No annotations are provided, so the description carries the full burden. It only says 'Body discarded,' which is minimal and does not explain side effects, permissions, rate limits, or what actually happens with the various parameters. The description gives no insight into behavior beyond a vague HTTP status check.

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 a single sentence, which is concise, but it is under-specified rather than efficiently informative. It omits critical information and does not earn its brevity; the sentence adds little value and leaves major gaps.

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?

For a tool with 9 optional parameters, no output schema, and no annotations, the description is completely inadequate. An agent has no idea what the tool returns, how parameters interact, what the 'hint' implies, or any constraints. This is far from sufficient for correct invocation.

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% coverage with short descriptions for each parameter, but these descriptions are generic and do not clarify how they relate to the tool's stated purpose. The description itself adds nothing beyond the schema. The parameters appear to be a disjoint collection, and the description does not connect them to the HTTP status check, making it hard for an agent to know which parameters are relevant.

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 verb and resource ('HTTP status for a public library docs URL') but the parameter schema includes unrelated fields like city, feed, json, path, zone, and query. The stated purpose is narrow and does not match the breadth of the schema, leaving the actual tool function ambiguous and potentially misleading for an agent.

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 the many similar siblings (fetch-status, domain-shape, normalize-url, etc.). No conditions, exclusions, or alternative routing are provided, so an agent cannot distinguish when this tool is appropriate.

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