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

The annotations already establish that this is a non-destructive mutation. The description adds useful behavioral context beyond the annotations: it 'decides nothing and blocks nothing' and stores the text verbatim, which helps an agent understand the effect of the write.

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 front-loaded and efficient. There is mild redundancy between 'without approving or sending it back' and 'Decides nothing and blocks nothing,' but the sentences remain useful and compact.

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 simple two-parameter mutation with no output schema and clear annotations, the description covers purpose, usage context, and behavioral effect sufficiently. An agent has what it needs to call the tool correctly.

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 100%, so both parameters are already documented. The description reinforces that the comment text is stored verbatim, but that meaning is close to the schema's own wording and adds little about post_id.

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 gives a specific verb and resource: 'Leave a comment on a post.' It also distinguishes the action from approval or rejection by saying 'without approving or sending it back,' which cleanly separates it from siblings like approve_post and send_back_post.

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?

It states clear use cases ('feedback, a question, or a note in passing') and an implicit when-not-to-use condition by contrasting with approval/send-back behavior. It does not name the alternative tools explicitly, but the selection guidance is strong.

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