signupgenius_report_filled

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

Beyond the readOnlyHint annotation, the description discloses that a specific API key is required and that session mode is unsupported for reports. This adds meaningful behavioral context not available from annotations alone, though it does not detail output structure or error 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 a single concise sentence followed by a brief requirement clause. It front-loads the core purpose and avoids any filler or redundancy, earning 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 simple one-parameter report tool with readOnly annotation and clear purpose, the description covers essential context including auth requirements and session limitations. However, since there is no output schema, it would benefit from explicitly stating what the report returns, but the tool's purpose makes this reasonably inferable.

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 already thoroughly describes the only parameter (signupId) with type and description, providing 100% coverage. The tool description adds no additional parameter information, so the baseline score of 3 is appropriate.

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 clearly states the tool's function: generating a report for a sign-up restricted to already-filled slots. This distinguishes it from sibling tools like report_available (available slots) and report_all (all slots), using a specific verb and resource.

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?

The description provides clear context: it is for filled slots, implying this is the right tool when interested in filled slots. It also specifies a requirement (SIGNUPGENIUS_USER_KEY, Pro subscription) and a limitation (session mode not supported), though it does not explicitly name alternatives like report_available or report_all.

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