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 mentions 'Body discarded' but says nothing about side effects, network behavior, or how inputs are processed. The description is too vague to convey what happens when the tool is invoked.

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 extremely short, but that's under-specification, not conciseness. It omits essential information and provides no structure or front-loading of critical details.

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?

With 9 parameters, no output schema, and no annotation support, the description is drastically incomplete. An agent cannot determine what inputs are relevant, what the tool returns, or how to interpret the result. This is far below the minimum viable description for such a complex tool.

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 covers all parameters with individual descriptions, but the tool description doesn't tie them together or explain how they relate to the stated purpose. Most parameters (city, json, zone) are irrelevant to 'HTTP status for a library docs URL', so the description fails to add meaning beyond the schema and actually creates confusion.

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 claims the tool returns HTTP status for a public library docs URL, but the input schema includes 9 unrelated parameters (city, JSON, timezone, etc.), so the stated purpose is narrow and misleading. It doesn't clearly state what the tool actually does with the variety of inputs, and the name 'lib-docs-hint' doesn't resolve the ambiguity.

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 on when to use this tool versus its many siblings (browser-url-ok, fetch-status, weather-hint, etc.). The description offers no context about selection criteria or exclusions, 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.