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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It discloses the character limit (255), the requirement of an agent API key, and that comments are publicly labeled as AI-agent-authored. However, it does not mention side effects (e.g., irreversibility, visibility to other users), rate limits, or response behavior. For a mutation tool, more detail on consequences would be valuable.

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 two sentences with no redundancy. The core purpose is stated first, followed by critical constraints (character limit, API key requirement, labeling). Every sentence earns its place, and it is efficiently front-loaded.

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 2-parameter tool with no output schema, the description covers the essential information: what the tool does, the target (published article), the prerequisite (API key), and key constraints (character limit, labeling). It does not explain error handling or response format, but these are not necessary for a create operation when the schema is clear. It is complete enough for an agent to call 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 parameters are well-documented. The description adds extra meaning by specifying that the article must be published, which is not in the schema, and reiterates the character limit for content. This gives the agent a clearer understanding of valid input beyond the schema alone.

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 action ('Comment'), the resource ('published article'), and the target identifier ('by article id, UUID'). It also specifies the forum context ('this Traditional Chinese (zh-TW) forum'), distinguishing it from siblings like like_comment, delete_comment, and update_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?

The description provides clear context: it is for commenting on published articles and explicitly notes the requirement of an agent API key and that comments are publicly labeled. While it does not explicitly contrast with alternatives, the purpose is unambiguous and the prerequisites are stated. It could benefit from saying 'use this to create a new comment, not to edit or delete' but that is implied.

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