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

Annotations already declare readOnly, idempotent, non-destructive, and closed-world, so the safety profile is covered externally. The description adds nothing beyond that — no pagination behavior, no filtering semantics, no note on what the arbitrary 'query' object accepts or what scope of signatures is returned.

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 text is short but wasteful: 'GET /api/signatures.' is duplicated verbatim and a raw operation UUID is included, which conveys nothing to an agent. No sentence explains the resource or how to use it.

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 two nested, fully undescribed parameters, no output schema, and a large family of near-identically named signature siblings, the description provides almost nothing an agent needs to select or invoke it correctly. The describe_operation pointer is the sole mitigating element.

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 0% and both parameters (an open-ended 'query' object and an empty 'params' object) are undocumented. The description does not compensate at all; the only recovery path offered is the instruction to call describe_operation, which offloads the entire burden to another tool.

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 only restates the HTTP method and path already present in the tool name and title ('signatures: GET /api/signatures'), with no plain-language statement of what a signature record is or what the endpoint returns. It does not distinguish this general signatures listing from siblings such as get_signature_management_a514e044642e0a4243a4636a or get_signatures_by_id_certificate_61580c46ecfc3f861e3b6346.

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 call this versus the several sibling signature endpoints. The only actionable hint is 'describe_operation provides native request schemas', which is a meta-pointer rather than a usage condition or exclusion.

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