Google Health Daily Summary

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

Annotations already provide readOnlyHint, destructiveHint, idempotentHint, and openWorldHint. The description adds value by specifying 'Read-only, beta, non-medical', which clarifies the non-medical nature and beta status. No contradiction with 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?

The description is a single sentence, concise and front-loaded with the purpose. However, it could be slightly improved by breaking into two sentences or adding more structure, but it effectively communicates the core idea without fluff.

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's simplicity (3 optional parameters, output schema exists, annotations rich), the description provides minimal but sufficient context about purpose and non-medical nature. However, it lacks usage guidance and parameter context, making it just adequate.

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 only 33% (only timezone has a description). The description does not add any parameter details or clarify the meaning of 'date', 'timezone', or 'response_format' beyond what the schema provides. With low coverage, the description should compensate but does not.

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 action 'Build a practical daily summary' and specifies the resource 'from Google Health rollups and reconciled streams'. It also distinguishes itself from sibling tools like 'google_health_daily_rollup' and 'google_health_weekly_summary' by mentioning 'daily summary' and 'when available'.

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 does not explicitly state when to use this tool versus alternatives. It only implies usage with 'when available', but lacks guidance on prerequisites, exclusions, or comparisons to related tools like 'google_health_daily_rollup' or 'google_health_weekly_summary'.

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