get_spo2_data

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

With no annotations, the description carries the full burden of behavioral disclosure, but it only states that SpO2 data is retrieved. It does not mention what happens when no data exists for the date, whether the returned value has units or a specific structure, or any other behavioral traits. The name implies a read operation, but the description adds little beyond that.

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 two short sentences and front-loads the tool's purpose before the argument documentation. There is no filler or repetition.

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 simple one-parameter getter with an output schema available, the description covers the essential input contract. It is slightly thin on behavior/no-data semantics, but that is partially mitigated by the output schema and the low tool complexity.

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?

The only parameter, date, is given meaning beyond the schema by specifying 'YYYY-MM-DD format'. Since schema description coverage is 0%, this is essential and adequate for a single-parameter tool, though it does not clarify timezone or what date the metric refers to.

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 names a specific action ('Get') and resource ('SpO2 (blood oxygen) data'), making the core purpose immediately clear. It does not explicitly differentiate itself from sibling data getters, but SpO2 is a distinct health metric so confusion is unlikely.

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 given about when to use this tool versus alternatives like get_respiration_data or get_heart_rates. The description simply states what it does and provides no conditions, prerequisites, or exclusions.

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