get_daily_body_battery

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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety is covered. The description adds one genuinely useful behavioral detail — the date range is inclusive — but the referenced 'official interface' date limits are never spelled out, and no return shape or data granularity is given. Useful but partial beyond the annotations.

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?

Front-loading the metric name is good and the core sentence is tight, but the two Chinese sentences duplicate each other and the English sentence, and the 'one-to-one with official client' claim earns no place. Roughly half the text is redundant.

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?

No output schema and 0% parameter coverage mean the description must fill the gaps, yet it omits date format, the meaning of 'chunks', the actual date-range limits, and any sense of what the returned Body Battery series looks like. For a 3-parameter ranged-query tool this leaves real holes.

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%, so the description carries the full burden and does not meet it: start_date/end_date formats are unspecified (only 'inclusive' semantics is conveyed) and the optional 'chunks' parameter is completely undocumented in both schema and description. An agent cannot tell what units, format, or purpose 'chunks' has.

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 English sentence names a specific verb and resource: return daily Body Battery data over an inclusive calendar date range. The resource name distinguishes it from the sibling metrics (stress, steps, hrv, etc.), so an agent can pick it without opening the schema. The Chinese preamble largely restates the same fact, adding no extra scope.

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 statement of when to use this versus alternatives, nor any prerequisite or exclusion. '参数和日期限制沿用官方接口' merely gestures at undocumented date limits that exist elsewhere instead of telling the agent what they are. The agent is left to infer usage from the resource name alone.

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