get_power_status

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 discloses the HTTP GET method, the return object with all fields and types, and example values, giving a complete picture of the tool's behavior. Since this is a read-only operation, no side effects are expected, and the description adequately covers its scope.

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 opens with a concise one-line summary, followed by relevant technical details, a bulleted return schema, and a use case. While the endpoint and internal function names add extra detail, they are useful for debugging and understanding the tool's implementation. 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?

There is no output schema, so the description fully documents the return object with field names, types, and example values. It also covers the use case and implementation. For a zero-parameter read-only tool, the description is complete and self-sufficient.

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 has no parameters, and the input schema is an empty object. The description correctly focuses on the return values and use case, so with zero parameters, the baseline of 4 applies.

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 it 'Retrieve power/battery status from the Busy Bar device', using a specific verb and resource. It distinguishes itself from siblings by focusing on power/battery, and details the exact endpoint and function used.

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 includes a 'Use case' section: 'Check battery health before operations that consume significant power; alert users when the device needs to be plugged in.' This provides clear context for when to use the tool, though it doesn't explicitly mention alternatives or exclusions.

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