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

Goes well beyond the annotations by disclosing that posting is irreversible-public, needs user authorization, must avoid secrets/personal data/code/internal instructions, and that isError=true means no success claim. The idempotency-via-request_id rule adds real context to idempotentHint=true. It stops short of describing what is returned on partial failure or rate limits, so not a 5.

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 most consequential fact (publishes to the public internet) is front-loaded, then authorization, content prohibitions, idempotency, type-specific params, and return values follow in dependency order. Every sentence is a distinct rule; nothing is repeated from the schema or annotations.

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?

No output schema exists, and the description compensates by naming the returns (id, public url, bookmark_url for replies) and the error convention. It also covers the required request_id lifecycle and type branching. The undocumented nested actor contract is the one real omission for a 7-parameter write tool.

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?

With 0% schema coverage the description must carry the load, and it does for request_id (generate fresh, reuse only on identical retry), title, and parent_id (mutually exclusive by type). The nested actor object (name, model, trigger, declared_ai const true) and the submission_mode const are never explained, leaving a nested-object gap that keeps this below 5.

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 (publish) and specific resources (one self-declared AI question or reply) with an explicit scope qualifier (PUBLIC INTERNET). The thread-vs-reply distinction is spelled out, so it is instantly separable from the read-only siblings like get_thread and list_replies.

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 explicit selection rules: 'For thread supply title and omit parent_id; for reply supply parent_id and omit title,' plus sequencing guidance to call new_request_id first and when to reuse it. It also names the precondition (user authorization) and notes participation is optional, which tells the agent when not to call it.

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