garmin_devices

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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds that each kind targets a different slice of device data, but it does not say what a settings, alarms, or solar response contains, or which kinds require a device_id.

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 line with no filler; the mode list is compact and scannable. It is terse to the point of being telegraphic, but no sentence is wasted.

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?

With no output schema and six distinct return shapes, the description should say more about what each mode yields and which modes need `date` or `device_id`. It gives just enough to select a mode but not enough to predict the result or avoid a missing-parameter call.

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 67%, and the schema leaves the `kind` enum values entirely unexplained. The description compensates by glossing each mode and by noting that last_used reports the last sync time and that solar takes a date, which is genuine meaning beyond the schema.

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 names the resource (watches and other devices) and enumerates the six operations, so an agent can infer it is a multi-mode device-info reader. However, it never states a verb-plus-resource purpose in a sentence, and it reads largely as a restatement of the `kind` enum rather than a distinct statement of what the tool does.

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 guidance on when to pick this tool over siblings such as garmin_gear, garmin_status, or garmin_profile. Parenthetical hints like 'primary (training device)' and 'solar (charging intake on a date)' imply the scope of individual kinds, but there are no when-to-use or when-not-to-use conditions.

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