get_device_solar_data

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

The description states it 'Returns solar charging data,' indicating a read-only operation. It also mentions the limitation that it is only for solar-capable devices, which hints at potential behavior for unsupported devices. However, it does not describe the output format, error handling, or whether it can return empty results.

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 concise, consisting of two short sentences and a simple argument list. No redundant information or filler is present, and the structure is clear and easy to parse.

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 description provides sufficient context for a simple getter tool: what it does, the compatible device types, and how to obtain the required parameters. It does not detail the structure of the returned data, but for a straightforward retrieval operation, the context is 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 provides no descriptions for the parameters, but the description compensates by explaining that device_id can be obtained from get_devices and that date must be in YYYY-MM-DD format. This gives enough semantic meaning for basic usage, though it lacks further detail on accepted values or constraints.

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 retrieves solar charging data for a specific device and provides examples of compatible devices (Instinct Solar, Fenix Solar). The verb 'Get' and resource 'solar data' make the purpose unambiguous.

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 explicitly notes that the tool is only applicable to solar-capable devices, giving a clear condition for when to use it. It also directs users to obtain device_id from get_devices, providing a practical prerequisite. It does not compare with sibling tools, but the applicability condition largely suffices.

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