review_design_pull_request

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

With no annotations present the description carries the full burden. It usefully discloses the Kiln Pro gating requirement and frames the outcome as a recorded diff/comments/merge record, but it never states what approving or rejecting actually does to the design, whether it is reversible, or what permissions are needed.

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?

Three short lines with the action front-loaded, then the product context, then the prerequisite. The upgrade/marketing URL adds a little noise but the informational content is tight and waste-free.

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 mutation tool with no annotations and no output schema, an agent still lacks post-call semantics (does approve merge the change? what does reject do?) and decision value formats. The prerequisite and conceptual model (PR with diff, comments, merge record) are covered, which keeps it above the minimum.

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 50%: body and decision have only default-value notes, and pr_id/user_id have no descriptions at all. The prose partially compensates by naming the candidate decision actions (comment, approve, request changes, reject), but no literal enum values, pr_id format, or user_id meaning are given.

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 first sentence names a specific verb+resource (review a design pull request) and enumerates the four decision actions, which makes it clearly distinct from read-only siblings like get_design_pull_request or list_design_pull_requests. It doesn't explicitly name those siblings, so it falls short of a 5.

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 implies this is the action tool for a PR that already exists, and it does disclose a hard prerequisite (Requires Kiln Pro) plus an upgrade path. But there is no explicit 'use this instead of X' routing or guidance on when not to call it.

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