Garmin Data Inventory

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

Annotations already declare readOnlyHint=true and idempotentHint=true. The description adds critical context: 'Does not call Garmin APIs or expose user data.' This clarifies the tool's internal behavior and constraints beyond the 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?

The description is one sentence that covers purpose, scope, and constraints. No wasted words, and it is front-loaded with the core action 'Inventory...'.

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 what the tool inventories and what it does not do. Given the simple parameter and strong annotations, it is mostly complete. However, it could mention that the output is a list or reference the output schema for clarity.

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?

The single parameter 'response_format' has a clear enum with default, and the schema description coverage is 0%. The description does not elaborate on the parameter, but the parameter is self-explanatory. 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 clearly states the tool's purpose: 'Inventory supported Garmin data domains, auth scope requirements, privacy boundary and recommended first calls.' It uses specific nouns and verbs, and distinguishes from sibling tools (which retrieve specific data) by being an overview/inventory.

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?

Annotations indicate it's read-only and idempotent, but the description does not explicitly state when to use this tool vs alternatives like garmin_onboarding or garmin_quickstart. The purpose implies it may be a starting point, but this is implicit.

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