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

The only behavioral detail is 'Body discarded', which hints at a read-only status check. However, with no annotations, the description carries full burden and fails to disclose what happens with the other parameters, what the return format is, or any side effects. It adds minimal context beyond the annotation-less state.

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 and front-loaded, but it is under-specified. It lacks structure and context, making it too minimal to be effective. While concise, it sacrifices essential information, so it doesn't earn a high score.

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 required fields, no output schema, and no annotations, this description is severely incomplete. It fails to explain the tool's purpose beyond a vague status check, doesn't specify what each parameter does in context, and omits return value details. The agent cannot confidently invoke this tool correctly.

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 description coverage is 100%, so each parameter has a description, but the tool description adds no parameter-level meaning. The schema descriptions are generic (e.g., 'HTTPS URL to normalize or cite' for url) and don't align with the 'library docs' theme. The description doesn't clarify which parameter is the primary input or how the optional parameters interact, failing to compensate for the ambiguity.

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 'HTTP status for a public library docs URL' which indicates a URL status check, but the meaning of 'lib-docs' is unclear and the tool name is ambiguous. It doesn't distinguish from siblings like fetch-status or browser-url-ok, and the many unrelated parameters suggest a broader function that is not explained.

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 given on when to use this tool versus alternatives such as fetch-status or browser-url-ok. There is no mention of context, prerequisites, or exclusions, leaving the agent without any basis for selection.

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