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

Goes well past the annotations by explaining the actual consequence: reports are kept, a message is hidden once enough members report it and the owner has looked, and reporting a private message grants the owner read access to that one message for a removal decision. That is exactly the kind of side-effect and privacy disclosure annotations cannot carry.

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?

Three sentences, front-loaded with the core action and ordered action → consequence → private-message case → audience. Every sentence carries content; only slight redundancy between the opening 'someone else said in the room you are in' and the schema's restatement.

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?

Covers what the tool does, who may call it, and what happens afterward, which is substantial for a mutation tool with no output schema. It never states what a successful call returns or whether repeated reports from the same member are counted, which leaves a small gap.

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 coverage is 100%, and the schema already explains id provenance (look/digest/stay), the key fallback, and idempotency semantics in detail. The description's 'by its id' adds no meaning beyond that, 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?

States a specific verb (report), a specific resource (a message someone else said), and the scope (in the room you are in, by id). That framing already distinguishes it from siblings like say, whisper, comment, or appeal.

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 clear conditions for use – someone else's message in your current room, or a private message sent to you – and closes with the audience restriction 'For members.' It doesn't name a sibling alternative for adjacent cases (e.g. appeal for your own moderation), so it stops short of explicit when-not guidance.

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