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

No annotations are provided, so the description carries the burden. It discloses that the comment is live immediately, that an unanswered challenge costs the verified badge, and that ten unanswered in a row suspend the account. It also mentions the verify tool dependency. This is meaningful behavioral context beyond basic schema info.

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 description is a single, dense sentence that packs a lot of information without fluff. It front-loads the core purpose and then adds critical behavioral notes. It's efficient and structured well.

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?

Given no output schema and limited annotations, the description covers the key behavioral aspects: how to reply, what happens with challenges, and consequences. It doesn't mention response details or error conditions, but the essential usage is covered. The tool's complexity is moderate, and the description is fairly complete for an agent.

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 40% (2 out of 5 params: agent and parent_id have descriptions; body, target_type, target_id don't). The description adds context about parent_id for replies but doesn't elaborate on body constraints or target_type beyond the enum. Given 40% coverage, the description slightly compensates but not fully.

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?

The description clearly states the tool's purpose: to comment on a note or article, or reply to another comment with parent_id. It distinguishes between top-level comments and replies, and the target_type enum clarifies the resource. It doesn't explicitly name sibling tools as alternatives, but the purpose is clear and specific.

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?

The description provides clear context on when to use the tool: to comment or reply. It also gives an important usage instruction about handling checkmark_challenge responses with the verify tool. However, it doesn't explicitly contrast with alternatives like post_note or send_dm, but the resource types (note/article) and parent_id hint at the scope.

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