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

There are no annotations, and the description does not explain side effects, error behavior, network access, or what 'Body discarded' means operationally. The input descriptions saying parameters are 'discarded' further obscure the tool's behavior.

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 short but not effective; it omits crucial context while including confusing, irrelevant phrases. The parameter descriptions add noise rather than clarity, making the overall structure unhelpful.

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?

The tool lacks an output schema, required parameters, and any explanation of what the HTTP status refers to. Given the nine heterogeneous parameters and no annotations, the description is far from complete enough for an agent to use safely.

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?

Although every parameter has a schema description, most descriptions state the value is 'discarded' or are unrelated to the stated purpose. The connection between parameters like 'city', 'zone', or 'json' and 'HTTP status for a public library docs URL' is entirely unclear.

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 'HTTP status for a public library docs URL. Body discarded.' is ambiguous and does not clearly state what the tool actually does. The name 'lib-docs-hint' and the unrelated parameter descriptions further obscure the intended purpose.

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?

No guidance is provided on when to use this tool versus alternatives like fetch-status, browser-url-ok, or web-fetch. The description does not mention use cases, prerequisites, or distinguishing characteristics.

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