steps_data

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

No annotations are provided, so the description must fully disclose behavioral traits. It only states it provides step details but does not mention whether the tool is read-only, if it requires authentication, if it can fail due to lack of data for a date, or what the rate limits are. Returns a 'StepsData' object, but no further behavioral context is given.

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 a single short phrase that is front-loaded and efficient. It contains no extraneous information, but it is minimal to the point of omitting necessary detail.

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?

Although there is an output schema (implied by 'has output schema: true'), the description is too brief to fully inform the agent. It lacks context on the optional parameter behavior, the nature of the step detail (e.g., hourly breakdown?), and how it differs from similar tools. For a simple, single-parameter tool, it is incomplete.

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 description coverage is 0%, meaning the schema's property 'date' has no description. The tool's description does not clarify the 'date' parameter format, accepted date ranges, or default behavior when omitted. Since there is only one optional parameter, the description offers no added meaning beyond 'a date string', so the agent is left to infer. Baseline is 3 due to 0% coverage but low parameter count.

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 '步数详情 — 当日步数明细' translates to 'Step details — same day step details', clearly indicating it returns step details for a specific day. However, it does not differentiate this tool from the sibling 'daily_steps', which likely also provides step data, lowering the clarity score.

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?

No guidance is provided on when to use this tool versus alternatives like 'daily_steps' or 'get_weekly_steps'. There is no mention of prerequisites, limitations, or preferred contexts, leaving the agent to guess.

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