Get Menstrual Data

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

Annotations declare readOnlyHint=true and openWorldHint=true, so the agent already knows this is a safe read (does not mutate state) and may return broad results. The description adds no extra behavioral context beyond what annotations provide, but it does not contradict them. No additional disclosure about response format or limitations.

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 one concise sentence with no filler, efficiently conveying the purpose. Front-loaded with the verb 'Get' and clearly names the resource. All content earns its place.

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?

Given the tool has only one parameter with full schema coverage, no output schema, and simple annotations, the description is adequate but lacks any mention of the return structure or typical usage scenarios. It's minimally sufficient but could benefit from noting what data fields are returned.

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%: the date parameter is fully described with format and required status. The description adds minimal extra meaning beyond restating that the tool works for a specific date, which aligns with the baseline 3 when schema covers all parameter details.

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 the tool retrieves menstrual cycle data for a specific date, which is a specific verb+resource combination. It is distinct from siblings since no other sibling mentions menstrual data, though it doesn't explicitly differentiate from similar get_* tools targeting date-specific data.

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 implies usage for retrieving menstrual data for a specific date, but provides no explicit guidance on when to use it versus alternatives, such as when broader cycle summaries are needed. No exclusions or when-not scenarios are mentioned.

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