garmin_activities_by_date

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

The annotations already convey readOnlyHint and openWorldHint, so the bar is lower. The description adds genuine behavioral detail: default of last 7 days when no range is given, and oldest-first ordering. 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?

A single, front-loaded sentence delivers the core behavior with no filler. Every word earns its place, and the key details, default window and sort order, are presented 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?

The description covers default range and ordering, which is helpful, but a date-range listing tool still leaves critical invocation details undefined: the expected date format and the role of the activity_type parameter. The presence of an output schema helps for return values, but parameter semantics remain incomplete.

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?

With schema description coverage at 0%, the description needed to explain start, end, and activity_type, but it only mentions 'date range' without specifying date format or inclusive/exclusive behavior. The property names are somewhat self-explanatory, but the description adds no meaning beyond them and ignores activity_type entirely.

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 (activities) and the primary criterion (date range), and adds useful specifics: default last 7 days and oldest-first ordering. This differentiates it from garmin_last_activity and garmin_activity, though the verb is implicit and it does not explicitly distinguish itself from the broader garmin_activities sibling.

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 implies when to use the tool: when a date-bounded list of activities is needed relaunch. However, it does not provide explicit guidance on choosing this over the similar siblings like garmin_activities, garmin_last_activity, or garmin_activity, and it offers no exclusions.

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