get_daily_spo2_by_id

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

No annotations are provided, so the description carries the full behavioral burden. It does not state that the operation is read-only/safe, what happens if the ID does not exist (error vs empty), or any timezone/date semantics of a 'daily' document. 'Get' weakly implies a read, but nothing is disclosed beyond the verb.

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?

A single short sentence with the resource and lookup key front-loaded. No padding or redundancy.

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 read with full schema coverage and no output schema, the description is minimally sufficient. However, it omits lookup-failure behavior and daily-document semantics that an agent would want when the ID may be stale or invalid.

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 100% and the single 'document_id' parameter is already documented as 'The unique document ID'. The description adds nothing (e.g., ID format or source) beyond the schema, so the baseline 3 applies.

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 states a specific verb ('Get') and resource ('a single daily SpO2 document'), and the 'by its unique ID' phrasing distinguishes it from the list-style sibling get_daily_spo2. It stops short of explicitly naming that sibling, but the singular/ID framing makes the distinction clear.

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?

Usage is only implied: the 'unique ID' requirement suggests the ID comes from a prior list call such as get_daily_spo2, but the description never says when to prefer this tool over the list variant or what to do if the ID is unknown. Adequate but with a clear gap.

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