get_garmin_sleep

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

No annotations exist, so the description must fully disclose behavior. It mentions the time range and data types but omits critical details: required authentication, potential limits on 'days', handling of missing data, and whether the output is summary or detailed. The lack of behavioral context beyond the basics makes it inadequate.

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 a single, front-loaded sentence with no waste. It efficiently communicates the tool's purpose and key parameter, making it easy to scan. Every word earns its place.

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 tool with one parameter and an output schema (per context signals), the description covers the main data types and scope. It lacks mentions of authentication or error conditions but is functionally complete for basic usage. Minor gaps prevent a perfect score.

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?

With schema description coverage at 0%, the description compensates by explaining the 'days' parameter as 'des N derniers jours', adding meaning beyond the bare integer type and default. This single mention is clear and sufficient for the simple parameter.

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 provides Garmin sleep data for the last N days, listing specific types (total, deep, REM, score). It effectively distinguishes from sibling tools like get_garmin_body_battery or get_garmin_hrv, which target different metrics.

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 implies usage for retrieving sleep data but offers no explicit guidance on when to use versus alternatives (e.g., other sleep-related tools) or prerequisites like authentication. No when-not or exclusion criteria are provided.

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