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

Annotations already declare readOnly/idempotent/open-world, and the description adds genuine context beyond them: metered usage tied to the connected account, no background polling or automatic retry, one bounded request, and an explicit affiliate exclusion (27). These are real operational traits an agent needs. It stops short of describing return shape or pagination.

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?

Compact, but the sentences are run-together and several clauses ("No wagers, account changes or guarantee of returns") read as boilerplate rather than actionable instruction. The most useful cues — canonical IDs, empty-result caveat — are buried mid-paragraph.

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?

An output schema exists so return values need not be described, and the account/metering caveats are a useful addition. Still missing anything about the sportID input, result granularity, or how this differs from the v1 equivalent, leaving gaps for a simple but ambiguous lookup 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?

The single parameter (sportID) is not mentioned in the description at all, and reported schema description coverage is 0%. Even though the schema itself enumerates common sport IDs, the description does no work to compensate for the coverage gap on the only input an agent must supply.

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?

States a specific verb and resource ("Get teams for a sport") so the agent knows the operation. However it does nothing to distinguish itself from the near-identical sibling v1GetTeamsBySport, and the trailing clauses ("Product data or price calculation") muddy rather than sharpen the purpose.

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?

"Use returned canonical IDs" and "never infer coverage from an empty result" give real usage guidance, which is above average. But there is no explicit when-to-use versus the v1 sibling or any other teams/markets tool, so the routing decision is left to inference.

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