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

Annotations only declare the write/open-world/safe profile; the description adds real behavioral context beyond them: a YouTube comment write burns 50 units of a daily quota shared across all Adeli users, and the resulting comment is public. The quota and public-exposure warnings are exactly the kind of consequence an agent cannot infer from structured fields.

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 parentId/postId branching, then platform caveats, quota cost and the confirmation requirement. Every sentence carries distinct information, though the nested parentheticals make the second sentence dense.

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 public write with no output schema, the description covers the branching logic, platform scope, quota cost and the user-confirmation safeguard. Remaining gaps (error behavior, whether a comment can be edited afterward) are minor given the sibling set provides update_comment and delete_comment.

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 coverage is only 33% (accountId and profileId documented), so the description must carry the load for postId, parentId, message and platform. It does explain the conditional semantics of parentId vs postId and the platform-dependent requirement, adding meaning the schema alone does not convey, though message constraints and platform enum implications are left to the schema.

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 (reply/comment) plus the two distinct resources it targets (a comment via parentId, a post via postId), and scopes the post-only path to Facebook, TikTok and YouTube. This distinguishes it cleanly from siblings like create_post, update_comment and delete_comment.

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 concrete routing rules: use parentId to reply, postId-only to comment on your own posts, and both for TikTok/YouTube replies. It also states the pre-call requirement to confirm text with the user. It stops short of naming alternative tools for overlapping cases (e.g., update_comment).

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