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 usefully adds that a GarminError is thrown when Garmin returns no data, which is real behavioral context beyond the annotations, but it says nothing about the shape or units of the returned floor count.

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?

Two short sentences, front-loaded with the metric and scope, with the error behavior appended. No filler or redundant restatement of the tool name.

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 single-parameter read-only metric tool with full annotation coverage and full schema coverage, the description covers the essential what and an error case. The only minor gap is the absence of any hint about the return value's shape, though no output schema exists to carry that.

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 coverage is 100% and the single cdate parameter is fully documented as YYYY-MM-DD (UTC) in the schema itself. The description only implies a date scope without adding format or timezone detail, so the baseline 3 is appropriate.

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 the specific metric (floors climbed and descended) and its scope (one date), so an agent can tell it apart from unrelated tools. It does not, however, differentiate itself from the many closely related daily-metric siblings such as get_daily_steps or get_calories_daily.

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 guidance, no prerequisites, and no mention of alternative tools for retrieving daily metrics. Usage must be inferred entirely from the tool name and the single required date parameter.

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