comment_on_pr

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

No annotations are provided, so the description carries the full burden. It states the tool adds a comment (implying a mutation/write operation) but doesn't disclose behavioral traits like required permissions, whether the comment is editable/deletable, rate limits, or error conditions. The mention of a JSON return is minimal and doesn't detail the response structure.

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 appropriately sized and front-loaded, with the purpose stated first. The Args and Returns sections add structure, though they could be more integrated. There's minimal waste, but it could be slightly more polished (e.g., combining sentences).

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 4 parameters with 0% schema coverage, no annotations, and an output schema (implied by 'Returns: JSON string'), the description is moderately complete. It covers the basic action and parameters but lacks details on behavior, error handling, and output specifics. The output schema reduces the need to explain return values, but more context on usage and constraints is needed for a mutation tool.

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 0%, so the schema provides no parameter descriptions. The description adds basic semantics by listing parameters (project, pr_id, comment, namespace) and noting a default for namespace, but it doesn't explain what these mean (e.g., format of project name, what namespace represents). This partially compensates but leaves gaps, aligning with the baseline when schema coverage is low.

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's purpose: 'Add a comment to a pull request.' It specifies the verb ('Add') and resource ('pull request'), making the action clear. However, it doesn't differentiate from sibling tools like 'close_pull_request' or 'merge_pull_request' beyond the obvious difference in action type.

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 no guidance on when to use this tool versus alternatives. It doesn't mention prerequisites (e.g., needing an existing pull request), exclusions, or comparisons to sibling tools like 'get_pull_request' for viewing comments. Usage is implied but not explicitly stated.

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