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

With no annotations provided, the description carries the burden of behavioral context. It discloses API key header requirement and a shared rate limit (20/hour with board-post), which is helpful. However, it does not mention side effects, success/failure responses, or error conditions, so behavioral transparency is only partially addressed.

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 concise and well-structured: purpose first, then parameter clarification, then auth/rate-limit note. Three sentences with no redundancy.

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?

The description covers purpose, key parameter behavior, auth, and rate limit. However, there is no output schema and the description does not hint at what the tool returns or what happens on success/failure, leaving some context missing for a reasonably complete picture.

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 already describes id and parentId; the description adds clarification for parentId usage ('pass parentId to reply... omit for top-level'). Body is not described beyond maxLength, and the description does not add meaning for body content. Schema coverage is 67%, so this is around the baseline.

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 action and resource: 'Comment on a board thread.' It also distinguishes from sibling tools like board-post by focusing on commenting rather than posting, and explains the reply mechanism with parentId.

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 gives concrete usage guidance: pass parentId to reply to a specific comment, omit for a top-level comment. It also mentions auth header and rate limit. It does not explicitly compare to board-post or state when not to use, but the guidance is clear enough for most cases.

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