list_devices

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

No annotations provided, so description carries full burden. It details the return fields (ID, name, last-seen, preference overrides) and that it returns a list. This sufficiently discloses behavior for a read-only list operation, though it could mention sorting or pagination if applicable.

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?

Extremely concise: two short sentences plus a return line. Every sentence adds value without redundancy or filler.

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?

Given the tool's simplicity (no params, no annotations, output schema present), the description adequately covers purpose, return structure, and fields. Lacks details on ordering or potential size, but not critical for a basic list.

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?

No parameters exist (schema coverage 100%, empty properties). Baseline score of 4 applies since no parameter info is needed; description focuses on return values instead.

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?

Clearly states 'List all devices registered for the current user,' specifying the verb (list) and resource (devices). This distinguishes it from siblings like 'test_provision_devices' which is about provisioning, not listing.

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?

Indicates the tool is for the current user's devices, providing clear context. No explicit exclusions or alternatives are mentioned, but given the simple parameterless interface, the intended usage is obvious.

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