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

Annotations already declare it is a non-read-only, non-idempotent, destructive, open-world operation; the description adds one genuinely useful behavioral fact — publishing to the platform happens asynchronously. It omits other behavioral context an agent needs, such as whether retries create duplicate comments and what permissions/profiles are required.

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?

Two sentences with zero waste: the core action is front-loaded and the platform-scope sentence is short and informative. 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?

With no output schema, the description should say what the call returns and how to learn the outcome of the async publish (e.g., a status check), which it does not. The async disclosure helps but leaves the agent unsure how to confirm the comment actually landed.

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 post_id, profile_id, text, and parent_id (including reply-vs-top-level semantics) are already fully documented in the schema. The description adds no parameter meaning beyond that, which is the expected baseline when the schema does the heavy lifting.

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+resource ("Create a comment or reply on a published post") and constrains scope to published posts, which separates it from comments_edit/comments_delete/comments_get. It does not distinguish itself from the ambiguous sibling profile_comments_create, so no explicit sibling differentiation.

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?

Implies usage (creating a comment or a reply, with platform support listed for Instagram, Facebook, Threads, YouTube, LinkedIn), but never states when-not to use it or points to an alternative such as profile_comments_create or dm_comment_private_reply.

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