Retrieve daily Body Battery reports for a calendar date or range from Garmin Connect. Specify startdate and optional enddate to analyze energy levels.
Daily Body Battery reports for a date or a date range (enddate defaults to startdate).
| Name | Required | Description | Default |
|---|---|---|---|
| enddate | No | Calendar date, YYYY-MM-DD (UTC) | |
| startdate | Yes | Calendar date, YYYY-MM-DD (UTC) |
Changes observed during successful MCP inspections.
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint and openWorldHint, so the safety profile is covered. The description adds the default behavior for enddate, which is useful context, but does not disclose return format, auth, or rate limits.
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 with no filler. The parenthetical default is compact and earns its place.
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 simple two-parameter read-only getter with annotations covering safety, the description is nearly complete. It states purpose and parameter default, but omits any indication of what a 'report' contains, which could matter without an output schema.
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 both parameters are documented with format and UTC note. The description adds the default value relationship (enddate defaults to startdate), which is not in the schema, providing meaningful semantic value.
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?
Names the resource (Body Battery) and the operation (daily reports) clearly, but does not differentiate from the sibling get_body_battery_events or state the scope beyond date filtering.
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?
Only states that it accepts a date or date range; no guidance on when to choose this tool over get_body_battery_events or other body battery retrieval tools, and no exclusions.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.