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

Annotations already declare readOnly, idempotent, and non-destructive behavior, lowering the bar. The description adds valuable behavioral context beyond annotations: 'per-race sources' and 'bounded partial failures' indicate how failures are handled in a multi-race batch. This is meaningful but not exhaustive, so a 4 is appropriate.

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 two concise sentences that front-load the core purpose and immediately follow with usage guidance. Every phrase earns its place, with no redundant elaboration or repetition of schema details.

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 low complexity (single parameter), rich schema descriptions, comprehensive annotations, and presence of an output schema, the description provides sufficient context. It covers what the tool does, when to use it, and key behavioral caveats like partial failures, making it complete for agent decision-making.

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?

The schema has 100% description coverage and clearly documents the races array, year, and round fields. The description adds little parameter-level meaning beyond restating the 2-to-8 range and consolidated nature that are already in 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 clearly states a specific verb ('Get') and resource ('2 to 8 complete historical Formula 1 race classifications') plus the key differentiator of a consolidated request. It explicitly distinguishes itself from the singular sibling tool get_f1_historical_race_result by naming it in the usage guidance.

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?

It gives an explicit usage directive: 'Use once for multi-race questions instead of repeating get_f1_historical_race_result.' This clearly communicates when to use this tool and names the alternative, satisfying the when/when-not/alternatives criterion.

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