get_menstrual_cycle_summary

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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds nothing behavioral on top: no indication of what the summary contains, whether it requires prior cycle initialization, or how a date with no tracked data behaves. It does not contradict the annotations.

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?

It is short, but that brevity comes from under-specification rather than economy. The trailing clause 'containing a date' is a fragment that restates the parameter and earns no place, and nothing useful is front-loaded.

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?

With no output schema, the description carries the burden of explaining what the returned summary holds, and it fails to do so. For a read-only one-parameter tool the bar is low, but an agent still cannot tell what fields or time span it will receive.

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 single 'fordate' parameter is fully documented (YYYY-MM-DD UTC) in the schema. The description's phrase 'containing a date' merely echoes the parameter and adds no format, range, or default semantics. Baseline 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 is a noun fragment rather than a verb+resource statement: 'A summary of the menstrual cycle containing a date.' It gestures at the returned artifact but never says what it retrieves or on whose behalf, and it does nothing to separate this tool from close siblings such as get_menstrual_data_for_date, get_menstrual_reports, or get_menstrual_calendar_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?

No when-to-use guidance, no prerequisites (e.g. whether cycle setup must exist first), and no mention of the many adjacent menstrual tools an agent could pick instead. The agent is left to guess between this and get_menstrual_data_for_date.

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