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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description meaningfully adds that the data is a 'mirror' with links to official sources, signalling that figures may lag the authoritative dataset — a behavioral nuance not present in the annotations.

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?

A single tight sentence with the key concept ('coverage and freshness') front-loaded and no filler. It is a sentence fragment without a verb, which slightly softens the opening, but no wording is wasted.

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 spelled out, yet the description helpfully enumerates the main fields anyway. For a zero-argument metadata tool this is nearly complete; only the intended trigger (e.g., 'use before citing result counts') is missing.

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 tool takes zero parameters, so the schema imposes nothing for the description to clarify; baseline for a no-arg tool is 4. Nothing in the description contradicts or muddies the empty argument object.

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 names a concrete resource and enumerates its contents: dancer/event counts, most-recent-event date, rulebook version, and official-source links. It is clearly distinct from every sibling (search_*, get_*_profile/results, get_division_stats). It stops short of a verb phrase like 'Return registry metadata', so it reads more as a field list than a statement of action.

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?

There is no explicit guidance on when to call this versus the sibling tools, nor any precondition such as 'call before relying on results to check data freshness'. The phrase 'coverage and freshness' implies a metadata/pre-flight check, but the agent must infer that intended usage entirely.

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