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

Beyond annotations (readOnlyHint=false, idempotentHint=false, openWorldHint=true), the description usefully discloses two behavioral facts: the message is attributed to the agent's own name and is publicly visible to everyone in the call. It says nothing about required permissions, whether the meeting must be active/joined, or failure behavior for a non-idempotent external write, so with annotations carrying the safety profile a 3 is appropriate.

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?

Two short sentences, front-loaded with the action and scope, with the audience/attribution detail following. Nothing is wasted or buried.

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 two-parameter tool with no output schema and full annotation coverage, the description covers what happens (a public, attributed chat post) but not how to identify the meeting or what preconditions apply. Adequate but with clear gaps for a non-idempotent external write.

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%, so the description must compensate for both parameters and it largely does not. The meaning of "text" is obvious, but the "meeting" parameter's expected form (ID, title, or URL) is left completely unspecified, which is a real risk of an incorrect call.

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?

"Posts a message in a meeting's chat" gives a specific verb and resource, and "under the agent's own name" clarifies whose identity is used. It is distinguishable from siblings like send_feedback or send_notetaker, though it never explicitly contrasts with them.

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?

Usage is only implied: an agent can infer this is for talking inside a meeting's chat, but there is no explicit statement of when to prefer it over other communication tools, nor any precondition (e.g. must already be in the call).

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