Reply to Post or Comment

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

The description lacks behavioral details beyond the basic action. It does not disclose that replying creates a new comment (a write operation), that the URL must be a valid Reddit URL, or any side effects, authentication needs, or rate limits. Since no annotations are provided, the description carries the full burden but fails to provide sufficient transparency.

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 very short (one sentence plus an instruction), making it concise but lacking in substance. It front-loads the purpose and a key requirement, but every sentence is necessary. The brevity comes at the cost of missing important context.

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?

Given the tool's simplicity and the lack of annotations, the description is incomplete. It does not mention that the URL must point to an existing post or comment, that the user must be authorized, or how the reply will appear. The sibling tools list includes related actions, but the description does not help the agent decide when to reply vs. create or edit.

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?

The input schema already has 100% coverage with clear descriptions for both parameters. The description adds only 'Provide a full URL,' which emphasizes the URL requirement but does not add new semantic meaning beyond the schema. Baseline of 3 is appropriate.

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 replies to a Reddit post or comment and instructs to provide a full URL. It is specific about the action and resource, but does not explicitly differentiate from sibling tools like 'create_post' or 'edit_content', though the verb 'reply' implies a response to existing content.

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 no guidance on when to use this tool versus alternatives, no context about prerequisites (e.g., the user must be logged in), and no mention of when not to use it. The only instruction is to provide a full URL, which is more of a parameter hint than usage guidance.

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