get_menstrual_data_for_date

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

The annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered and there is no contradiction. The description adds the scoping fact that it returns a single day's view, but says nothing about what fields come back or the sensitivity/permission considerations of menstrual data.

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?

A single short sentence with the scope constraint front-loaded and no filler. It is terse to the point of being fragmentary, but nothing is wasted.

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 one-parameter read tool with no output schema and full annotation coverage, the description is adequate but thin: it does not say what the 'day view' contains or how it relates to the sibling menstrual endpoints. Minimum viable, not complete.

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% and the single parameter (fordate, YYYY-MM-DD UTC) is fully documented in the schema. The phrase 'for one date' merely restates that constraint, so the baseline of 3 applies.

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 names a specific resource (menstrual-cycle day view) and scopes it to a single date, so an agent knows this is a per-day read rather than an aggregate. However, it never distinguishes itself from close siblings like get_menstrual_calendar_data, get_menstrual_cycle_summary, or get_menstrual_reports, which an agent must disambiguate by schema inspection.

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 explicit when-to-use statement, no prerequisites, and no named alternative. In a crowded menstrual-data family (calendar, summary, reports, last_confirmed, daily log), the description gives no routing guidance for choosing this tool over its siblings.

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