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

Annotations already mark this readOnly and closed-world, but the description adds real context: no auth is needed, the data is public, and the winner is deliberately limited to 'display name and time only' — a privacy constraint an agent could not infer from annotations. It stops short of covering freshness, caching, or the shape of the response when no winner exists beyond the `winner|null` hint.

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?

Front-loaded with the resource and its purpose, followed by auth, argument, and return-shape notes in a logical order. The field list is given twice — once in prose and again in the `Returns {...}` signature — which is mild duplication but not costly at this length.

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?

There is no output schema, so the description carries the full burden of telling the agent what comes back, and it does so with a complete field signature including the nullable winner. Combined with the auth note and zero-arg statement, an agent has everything needed to call and interpret this 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?

There are zero parameters, so the baseline is 4; the description explicitly says 'Args: none', which matches the empty schema and removes any doubt about required input. Nothing further is needed.

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 (returns the workshop room's public scoreboard) and enumerates the exact contents: enrollment count, skills covered, recipe, manifests, winner, join URL. An agent can distinguish this from ic_workshop_crosstalk_feed or ic_donate without opening any schema.

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?

The description establishes context by equating the output with the /workshop/live screen, which implies when an agent would want it, and clarifies 'No auth required'. However, it never says when to prefer this over a sibling or what state makes it the wrong choice (e.g. before the workshop opens). Usage is implied rather than directed.

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