Training status

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

The annotations already declare readOnlyHint=true, so no safety contradiction exists. The description adds a temporal behavior ('as of a date'), which clarifies that results are a snapshot for a particular date, but it does not disclose more about data availability, units, or how missing data is handled.

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?

One short sentence, no filler, no redundancy. The core output is front-loaded and the date scoping is stated efficiently.

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 low complexity (one optional parameter, read-only annotations, and an output schema present), the description is mostly complete for selecting and invoking the tool. The main gaps—date format and null behavior—are meaningful but minor for such a simple tool.

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 0%, so the description carries the full burden for explaining the sole `date` parameter. It does clarify that the date is the as-of date, but it does not explain expected format, the meaning of null/default, or how the date affects the returned metrics. This is thin compensation for an undocumented parameter.

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 identifies the resource (training status) and the specific metrics returned (acute/chronic load balance and VO2 max), scoped by date. It lacks an explicit verb and does not directly differentiate from sibling tools like garmin_vo2max, but the combined metric list makes its purpose reasonably clear.

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 guidance on when to use this tool versus alternatives such as garmin_vo2max, garmin_training_readiness, or garmin_daily_summary. The description implies a metrics-query use case but provides no explicit context, exclusion, or preferred-alternative guidance.

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