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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds useful context about what the data is and where it comes from (daily summaries synced from watch or phone, with specific metrics), but does not disclose sync delays, availability limitations, or return behavior beyond that.

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 compact sentence that front-loads the key content: daily health summaries, data source, and included metrics. There is no redundant or padding language.

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 read-only listing tool with no output schema, the description gives a reasonable indication of the data returned (daily summaries with steps, sleep, heart rate). However, it does not describe return structure, date grouping, ordering, or how the days parameter affects output, leaving the agent to infer those details.

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%, so both parameters are already documented in the input schema, including days defaulting to 30 and studentId coming from list_students. The description does not add parameter-specific semantics beyond what the schema provides.

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 specific resource and content: daily health summaries synced from a student's watch or phone, including steps, sleep, and heart rate. It is clear what data the tool exposes, but it does not differentiate this history tool from sibling tools like get_student_health or get_workout_health_summary.

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 gives no guidance on when to use this tool versus alternatives such as get_student_health or get_workout_health_summary. It implies a health-history use case through the name and data description, but provides no explicit conditions, exclusions, or alternative routing.

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