get_device_stats

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

No annotations are provided, so the description carries the full burden. It says 'Get' but doesn't disclose how the tool decides between temperature history and energy consumption, what happens if the device lacks such data, or any other behavioral details like rate limits or error scenarios. The ambiguity of 'or' is a notable gap.

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 a single, front-loaded sentence that conveys the purpose without any unnecessary words. It is appropriately concise and well-structured.

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 tool has a single parameter and no output schema. The description states what it returns (temperature history or energy stats) but leaves ambiguity about whether it returns both or one depending on device type. Without an output schema, the description could have clarified the return structure, but for a simple tool it is minimally adequate.

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 schema fully describes the single parameter 'ain' with its purpose (Actor Identification Number). The description adds no additional meaning to the parameter, so the baseline of 3 applies due to high 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 tool's function: 'Get temperature history or energy consumption statistics for a smart home device'. The verb 'Get' and the specific resource (device stats) distinguish it from siblings like get_system_info, get_bandwidth_stats, and get_device_log.

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?

The description implies usage (when you need temperature or energy stats) but does not explicitly mention when not to use it or provide alternatives. No exclusions or comparisons with sibling tools are given, so it only offers implied context.

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