get_daily_spo2

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

With no annotations provided, the description carries the full burden. It only states the basic purpose and parameters. It does not disclose what the output looks like, whether permissions are needed, what happens if no data exists, or any side effects. Minimal behavioral 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 description is very concise: two sentences for purpose and a compact arg definition. No unnecessary words. Ideal length for a simple two-parameter tool.

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 existence of an output schema (not shown), the description does not need to explain return values. However, it lacks any context about data granularity (daily average? per hour?), which would be helpful for a health data tool. It is minimally complete but not rich.

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 coverage is 0% (no parameter descriptions in schema). The description adds meaning by specifying date format (YYYY-MM-DD) and defaults (yesterday/today). This is helpful beyond the bare schema which only shows type and default null. However, it does not clarify inclusivity or return granularity.

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 'Get daily blood oxygen (SpO2) saturation readings.' The verb 'Get' and the specific resource 'daily blood oxygen saturation readings' make the purpose unambiguous. It distinguishes itself from siblings like get_daily_sleep or get_vo2_max by focusing on SpO2.

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 on when to use this tool versus alternatives. The description does not mention when not to use it, or under what circumstances this tool is appropriate compared to other daily metric tools like get_daily_activity or get_heart_rate.

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