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

The annotations indicate idempotentHint=true and readOnlyHint=false, but the description adds meaningful context: it states that closing ends the exchangeaiman, that it is safe to retry (already closed comments return resolved:false), and that it works without a commit. This goes beyond the annotations, providing important operational details about the tool's behavior.

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 a single paragraph with multiple sentences, but it is dense and information-rich. It is not overly long for the complexity of the tool, and each sentence adds value: purpose, use cases, alternatives, constraints, and retry behavior. It is well-structured with logical flow from what it does to when to use it to edge cases.

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 tool with only 2 parameters, no output schema, and annotations covering mutability and idempotency, the description covers the essential aspects: what it does, when to use it, how to use it, and what happens on retry. The only minor gap is not explicitly stating the outcome (that the comment becomes 'resolved'), but the description implies it. Overall, it is quite complete for its complexity.

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 schema description coverage is 100%, meaning the schema already fully documents both parameters. The description adds context for 'note' (what it is for) and 'commentId' (how it is obtained), which is slightly beyond the schema but not significantly. The baseline is 3 given the coverage, and the description doesn't add substantial new meaning beyond what the schema already provides.

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 specific action: 'Close ONE review comment WITHOUT a commit' and explains its intended use cases (questions answered, deliberate decisions not to make changes). It distinguishes itself from siblings like review-reply and the commit trailer mechanism, making it easy to know exactly what this tool does.

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 explicit guidance on when to use this tool versus alternatives: it contrasts with the commit trailer (for when a commit addresses the comment) and review-reply (for asking a question instead of answering). It also notes that closing 'ends the exchange' and specifies that you may close comments addressed to you or marked 'unassigned'. This is comprehensive with clear exclusions.

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