get_devices

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

With no annotations, the description carries the disclosure burden. It does convey the read-only nature of the operation ('Get all'), but it does not mention authentication requirements, absence of side effects, or any list-specific behaviors such as ordering or pagination. It is minimally transparent but not comprehensive.

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?

Single, front-loaded sentence with no filler. 'Get all Garmin devices associated with the user account' conveys the essential meaning 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?

This is a simple zero-parameter getter with an output schema present. The description adequately covers what the agent needs to invoke the tool correctly; return-value details are supplied by the 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?

The tool takes zero parameters and schema coverage is 100%, so there are no parameter semantics requiring additional explanation. Per baseline for zero-parameter tools, the description does not need to compensate for schema gaps.

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?

Description uses a specific verb ('Get') with a clear resource ('all Garmin devices') and scoping ('associated with the user account'). This distinguishes it from sibling tools like get_primary_training_device or get_device_settings, which target specific device-related subsets.

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 use this tool versus alternatives such as get_device_last_used, get_device_settings, or get_primary_training_device. The description states the function but leaves selection criteria entirely to the agent's inference from sibling names.

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