garmin_activities_by_date

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It only says 'Activities within a date range,' which does not explain behavior such as whether the date range is inclusive, how the activity_type filter behaves, how results are ordered, or whether the returned list is paginated. No contradictions exist, but the description is too thin.

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 short sentence with no filler. It is front-loaded with the core concept, though it errs on the side of under-specification rather than verbosity.

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 schema is rich and there is an output schema, so the description does not need to explain return values or all parameter details. However, given the large sibling set (including garmin_recent_activities), the description should have provided more context on when this date-range tool is the right choice. It is minimally adequate but not complete.

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 100%, so the baseline is 3. The description adds no parameter meaning, but the schema already documents start_date, end_date (with default 'today'), and activity_type as a 'Garmin type key filter'. Thus the description does not need to compensate.

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 resource (activities) and the scope (within a date range), which is enough for an agent to get the basic idea. However, it lacks a verb like 'list' or 'fetch' and does not explicitly distinguish itself from siblings like garmin_recent_activities or garmin_activity.

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. The description does not say when to use this tool versus garmin_recent_activities (which may be more appropriate for recent activities) or garmin_activity (for a single activity). There are no exclusions or conditions stated.

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