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

Annotations cover readOnly/idempotent/non-destructive, and the description adds real value beyond them: affiliate 27 exclusion, no-wagers constraint, empty-result caveat, and 'no background polling or automatic retry'. Does not explain return format or the 'allowlist' membership rules, but that is covered adequately given the output schema exists.

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 first sentence duplicates the title verbatim, then the description reads as a run-on list of unrelated constraints (price calculation, affiliate exclusion, wagers, guarantees). Front-loading is poor and several clauses (e.g., 'Product data or price calculation') add no actionable meaning.

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?

Covers the main behavioral guardrails for a read-only public endpoint, and an output schema exists so return values needn't be explained. But the disjointed phrasing, tautological opening, and absence of usage guidance against the many sibling listing/schedule tools leave the agent without clear routing information.

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?

Only one parameter, whose enum is visible in the schema ('fifa'). Description says nothing about the path.tournament parameter's allowed values or format, so it adds no meaning beyond the schema — but with a single fully-enumerated parameter, the baseline is a 4.

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 (Read) plus resource (public allowlisted tournament schedule and scores) and explicitly excludes odds. Distinguishable from odds-oriented siblings like v2GetBestOdds and v2GetOutliers.

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?

Provides behavioral guardrails (no polling, no retry, use canonical IDs) but never says when to use this tool versus alternatives like get_main_lines or v1GetScheduleBySport. Usage context is implied by the 'public allowlisted' scope rather than explicitly stated.

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