list_sessions

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

The description indicates this is a read-only operation that lists sessions with specific data fields. However, no annotations are provided, and the description does not disclose any potential side effects, performance implications, or what happens if no sessions exist. It is adequate but minimal.

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 sentence that immediately states the tool's purpose and the information it provides. It is concise and front-loaded, though it could be slightly more informative about data format.

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 tool has zero parameters and an output schema exists (reducing need to detail return values), the description is nearly complete. It lacks guidance on usage context but covers the basic purpose. Adequate for a simple list tool.

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 description coverage is 100% (no parameters), but there are no parameters to explain. The description adds value by listing the output fields, which compensates for the lack of parameters. Baseline 3 is appropriate.

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 the tool lists recorded sessions and the data fields included: car, track, lap count, and best time. It is specific and distinguishes the tool from siblings like list_laps or lap_summary.

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 others like list_laps or compare_laps. The description does not mention prerequisites (e.g., recording must exist) or when this tool is preferred.

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