withings_get_devices

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 that the tool fetches live data and returns device type, model, battery level, and last session date. This is sufficient for a non-destructive tool with no parameters, though additional details on authentication or rate limits could be beneficial.

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 three short sentences, front-loaded with the purpose. Every sentence adds value, and there is no redundancy or wasted words.

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 no parameters and the presence of an output schema (not shown but indicated), the description is complete. It covers the purpose, behavior, and return fields adequately.

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?

There are no parameters (0 params, 100% schema coverage). The description adds value by detailing what the return includes (battery level, firmware info), which goes beyond the empty schema. Baseline for 0 params is 4, and the added context warrants a 5.

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 gets connected Withings devices with battery and firmware info. The verb 'Get' and resource 'connected Withings devices' are specific, and it distinguishes itself from sibling tools that focus on other data types like activity or sleep.

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?

It notes that the data is 'Always fetched live from the Withings API,' implying when to use this tool (for live device status). However, it does not explicitly mention when not to use it or suggest alternatives, though the sibling names naturally guide usage.

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