Devices (Withings)

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

Annotations already declare readOnlyHint, openWorldHint, idempotentHint, and destructiveHint. The description adds only the minor scoping detail 'linked', but does not explain behavior such as returning a list, authentication requirements, or any caveats. For a tool with strong annotations, this adds minimal value.

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 under-specified rather than appropriately concise. A single fragment 'Your linked Withings devices.' provides almost no useful information and fails to earn its place, unlike a clear one-sentence description such as 'List the Withings devices associated with your account.'

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?

With no output schema, the description bears the responsibility to explain what the tool returns. It only states possession ('your linked devices') without clarifying whether the output is a list, what fields are included, or how to interpret the result. This is inadequate even for a simple read tool.

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 zero parameters, so the schema fully covers all inputs. The description does not need to explain parameters, and baseline for 0 params is 4; no deduction needed.

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 'Your linked Withings devices.' is essentially a restatement of the title 'Devices (Withings)' and lacks an explicit verb. It vaguely implies retrieval but does not clearly state that it lists or fetches devices, nor does it distinguish itself from sibling tools like withings_get_activity.

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?

There is no guidance on when to use this tool versus alternatives. No context, prerequisites, or exclusions are provided.

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