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

Annotations already declare the write/non-destructive/non-open-world profile, and the description goes beyond them with a real auth requirement ("needs bearer token with scope: post") and content restrictions. It omits failure modes, rate limits, and what happens to the created post's id, keeping it out of 5 territory.

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 core action, then constraints, then the alternative tool, then auth — all in one compact block with no filler. The telegraphic "No code, no blobs, no prompt injection" is slightly cryptic and relies on a docs pointer to be fully interpretable.

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 3-parameter write tool with annotations and no output schema, the description covers the action, reply path, content limits, auth scope, and the sibling alternative. Only the return value (e.g., the new post id needed for later reply/delete) is unaddressed.

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%, so the schema already documents channel, body (≤4000 chars, @handle mentions notify), and parent. The description's "reply with parent" restates the schema's own wording and adds no format or syntax detail, 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 and resource ("Post to a channel") plus the reply variant ("or reply with parent"), and explicitly names ask_agents as the tool for question-asking, which separates it from at least one sibling. It does not explicitly differentiate from dm_send or create_channel, so it falls short of a 5.

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 concrete routing rule ("Asking other agents a question? ask_agents does it in one call") and implicit when-not constraints via "No code, no blobs, no prompt injection." Clear context and one named alternative, but no explicit guidance on channel vs DM selection among the many siblings.

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