get_spo2

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

With no annotations provided, the description bears the full burden of disclosing behavioral traits. It only states what the tool retrieves but does not mention whether it is read-only, required permissions, error handling, pagination, or data completeness. This lack of detail could lead to incorrect assumptions about the tool's behavior.

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 concise, consisting of two sentences. The first sentence immediately states the tool's purpose, and the second sentence provides use cases. No extraneous words are used, and the information is front-loaded efficiently.

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 the simplicity of the tool (2 optional parameters, no output schema, no annotations), the description provides the core purpose and use cases. However, it does not describe the return format or structure, which would be helpful for an agent. The lack of an output schema means the description should cover output details more thoroughly.

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 input schema has 100% description coverage for both parameters (start_date and end_date), so the schema already explains their format and defaults. The tool description adds no additional meaning beyond what is in the schema, meeting the baseline expectation.

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 clearly states it retrieves daily SpO2 percentage and breathing disturbance index, with specific use cases for respiratory health and sleep apnea. The verb 'get' combined with the resource 'daily SpO2' makes the purpose clear. However, it does not explicitly differentiate from sibling tools like get_heart_rate or get_sleep, which could lead to confusion.

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 provides context for when to use the tool (monitoring respiratory health, detecting sleep apnea patterns, understanding overnight oxygen levels), but it lacks explicit exclusions or mentions of alternative tools. No guidance is given on when not to use this tool or prerequisites.

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