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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so the safety profile is fully covered by structured data. The description adds only that the content is about capabilities, privacy, and an 'approved public catalog', giving no sense of format, size, or whether the catalog is static or filtered — modest added value given the annotation coverage.

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 short, front-loaded sentence with no filler or repetition. It is terse to the point of underspecification rather than verbose, which is the lesser sin here.

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?

With no parameters and no output schema, the description carries the full burden of telling the agent what the return looks like, and it only gestures at three topic areas without describing structure or whether the response is static reference data. Adequate for a no-arg meta tool, but not sufficient to route confidently.

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?

Zero parameters, so the baseline is 4; there is nothing for the description to disambiguate. The description correctly implies the tool is argument-free and self-contained.

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 has a verb ('Discover') and names three content areas (capabilities, privacy, approved public catalog), so it is not a pure tautology. However, 'Referee' is never defined, and the phrasing is abstract enough that an agent cannot confidently predict what comes back versus a sibling like list_verticals or get_referee_readiness.

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 indication of when to call this tool, whether it should be called first on onboarding, or how it differs from nearby discovery tools such as get_referee_readiness, get_referee_usage, or list_verticals. The agent must infer placement in a 26-tool namespace from the name alone.

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