Get Max Metrics

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

Annotations already declare readOnlyHint=true, so the description doesn't need to state safety. However, it adds no behavioral context beyond the content of the data (VO2 max and related fitness data), such as aggregation, date range behavior, or return format. This is minimal added value beyond 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, efficient sentence with no unnecessary words, achieving high conciseness and clear structure.

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 one optional parameter, no output schema, and read-only annotations, the description is too vague about what 'max metrics' includes and how it differs from many similar getters like get_health_metrics or get_fitness_stats. It does not clarify the return structure or the meaning of 'related fitness data', leaving the agent uncertain about when to invoke it.

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?

The input schema fully documents the date parameter with a regex pattern and description, and the tool description adds nothing extra about parameters. Since schema coverage is 100%, the description's omission is acceptable, earning a baseline score of 3.

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 'Get max metrics including VO2 max and related fitness data' providing a clear verb and resource, and names a specific metric (VO2 max). However, it does not distinguish from sibling tools like get_health_metrics or get_fitness_stats, leaving the scope ambiguous.

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 usage guidance is provided; there is no mention of when to use this tool versus alternatives or any exclusions, making it impossible for an agent to decide when this tool is appropriate.

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