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

Annotations already establish readOnlyHint, idempotentHint, and destructiveHint, so the description does not need to restate safety. It adds valuable behavioral detail by enumerating the returned content: host, audience size, and game-specific fields like prompt, turn, and scores. This is especially useful given there is no output schema.

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 description is one well-structured sentence that front-loads the query intent and packs in the full return shape without filler. Every clause adds relevant information.

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?

For a simple one-parameter, read-only, idempotent tool, the description is largely complete. It compensates for the missing output schema by detailing the returned event types and fields. Minor omissions like empty-result behavior or pagination are not critical given the tool's simplicity.

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?

Schema description coverage is 100% for the single required 'room' parameter, including an example format such as 'main-bar#2'. The description only references 'in a room' and adds no new parameter-level meaning beyond what the schema already provides, so baseline 3 applies.

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 clearly identifies what the tool does: show current on-stage events in a room, including concerts, talks, and games. It specifies the resource (room events) and the scope (right now), but it does not explicitly name or contrast sibling tools like whats_happening or read_room.

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 phrase 'in a room right now' implies the tool is for checking current staged events in a specific room, but there is no explicit guidance about when to prefer it over alternatives such as list_rooms, read_room, or whats_happening. No exclusions or alternative routing are provided.

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