Withings Sleep Detail

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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the tool is safe. The description adds value by specifying that it requires the 'user.activity' scope and includes a disclaimer 'Not medical advice'. This context goes beyond what annotations provide, helping the agent understand permissions and limitations.

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 very concise: three short sentences that convey purpose, requirement, and disclaimer. No unnecessary words. Ideally structured for quick comprehension.

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 that an output schema exists, return values are documented. The description includes scope and disclaimer. Many parameters are well-described in the schema. However, it does not contrast with sibling tools, which would be beneficial for completeness. Overall, it provides sufficient context for a list 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?

Schema coverage is 88%, so most parameters are already described in the schema. The description does not add new information about parameters; it only covers scope and disclaimer. Thus, it meets the baseline but does not enhance parameter understanding.

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?

Description clearly states 'List detailed Withings sleep data where available.' The verb 'List' and resource 'sleep data' are specific. The word 'detailed' distinguishes it from the sibling 'withings_list_sleep_summary', which likely provides summary data.

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 mentions the required scope ('Requires user.activity scope') and notes the data is only 'where available'. However, it does not explicitly state when to use this tool versus alternatives like 'withings_list_sleep_summary' or others. More guidance on choosing between detailed and summary would improve usability.

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