set_led

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

The description accurately states the core behavior (turning LED on/off) but provides no additional behavioral context such as side effects, permissions, or rate limits. Since no annotations are present, the description carries the full burden, and it is minimally adequate.

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: one sentence for purpose, then two lines for args. No wasted words, and the structure is clear and front-loaded.

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 binary setter tool with no output schema, the description covers purpose and parameters completely. No missing necessary details given the tool's complexity.

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 description explains both parameters: device_id comes from list_pets, and active expects True/False. This adds value beyond the schema (which has no descriptions), compensating for the 0% schema coverage.

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 action ('Turn on or off') and the resource ('tracker LED light'), which distinguishes it from siblings like set_buzzer or set_live_tracking.

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 explicit guidance on when to use this tool versus alternatives such as set_buzzer or set_live_tracking. It does indicate that device_id comes from list_pets, implying a prerequisite, but lacks when-not or alternative suggestions.

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