get_daily_spo2

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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds that behavior mirrors the official client and that date restrictions apply, but it does not specify those restrictions or any auth/rate-limit context.

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 definition is short and front-loads the metric name, but it mixes Chinese and English and partly repeats the same purpose across languages. The note about official-client correspondence is relevant but vague.

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?

For a one-parameter daily metric tool, the core purpose is present and annotations cover read-only behavior. However, the missing calendar_date format/range and the absence of an output schema leave important invocation details underspecified.

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%, and the sole parameter calendar_date is not given a format, timezone, or allowed range. The description only says date limits follow the official interface, which is too vague to compensate for the missing schema detail.

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 states a specific verb ("Return") and resource ("daily SpO2 and acclimation data") scoped to a calendar date. This clearly separates it from sibling daily metrics like steps or hydration, though it does not explicitly contrast with broader daily summaries.

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 gives no explicit guidance on when to use this tool versus alternatives such as get_daily_summaries or other daily metric tools. "参数和日期限制沿用官方接口" only notes that date constraints exist, not the conditions for selecting this tool.

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