fastf1-mcp-server

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

No annotations are provided, so the description carries full burden. It mentions the data source (Ergast API via FastF1), which adds context, but lacks behavioral details such as rate limits, authentication needs, error handling, or whether it's a read-only operation. The description doesn't contradict annotations (none provided).

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 well-structured with clear sections (purpose, data source, args, returns) and uses bullet-like formatting. It's appropriately sized, but the 'Data source' note could be integrated more seamlessly, and the 'Returns' section slightly repeats info that might be in the output schema.

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 2 parameters with 0% schema coverage, no annotations, and an output schema (implied by 'Returns'), the description does a good job covering purpose, parameters, and return values. It could improve by adding more behavioral context (e.g., caching, errors) or usage guidelines relative to siblings, but it's largely complete for a read operation.

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 0%, so the description must compensate. It effectively explains both parameters: circuit_id (Ergast ID, with None for all circuits) and year (filter to season). This adds crucial meaning beyond the bare schema, though it could specify format examples beyond 'monaco' or clarify year range constraints.

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's purpose with 'Get circuit information' and specifies the data source (Ergast API via FastF1), which distinguishes it from sibling tools focused on drivers, standings, telemetry, etc. However, it doesn't explicitly differentiate from potential similar 'get' tools beyond the 'circuit' focus.

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 through parameter explanations (circuit_id for specific/all circuits, year for seasonal filtering) but doesn't explicitly state when to use this tool versus alternatives like 'list_events' or 'get_schedule'. No guidance on prerequisites or exclusions is provided.

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