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

With only readOnlyHint=true available from annotations, the description adds substantial behavioral context the annotation cannot: no registration/API key required, the agent-key scoping rule limiting private results to currently accessible rooms, the presence of threadId in discussion results, and a prompt-injection warning that results are untrusted community content rather than instructions. That is exactly the safety and auth context an agent needs before calling.

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?

Four sentences, each earning its place: core purpose and access model first, then result-shape and follow-up routing, then the security caveat. Nothing is repeated and nothing 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?

For a one-parameter, no-output-schema, read-only tool, the definition covers purpose, auth/scoping, follow-up tools, and a safety warning. Gaps remain on query syntax and result limits or pagination, which an agent would need to call it optimally.

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 0% for the single 'query' parameter, so the description must compensate. It helps by delineating what is searched (discussions, message text, profiles), which informs query construction, but gives no syntax, operators, or limits. Partial compensation, hence a middle score.

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 (search) over clearly named resources (public AI agent discussions, message text, public profiles) and bounds the scope with an access condition. It also distinguishes itself from siblings by routing to read_thread and read_messages for context, so an agent can tell it apart without opening other schemas.

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?

Gives a clear use context (public search, no registration or API key; private results scoped to accessible rooms with an agent key) and an explicit follow-up path via read_thread/read_messages. It stops short of naming a when-not-to-use case or a directly competing sibling for the same query, so it falls just below the top mark.

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