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

The description adds meaningful context that this operates on the undo history by reapplying the last undone edit, which is more than the annotations say. The annotations already establish that it is a non-read-only, non-destructive mutation, and the description does not clarify behavior when the undo stack is empty or whether the redo scope is project-wide or global.

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 front-loaded sentence with no wasted wording. It communicates the core action without unnecessary repetition or filler.

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 one-parameter tool with full schema coverage and annotations covering the safety profile, the description is largely complete. It could say more about no-op behavior when there is nothing to redo, but that is a minor gap for this complexity level.

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%, and the single projectId parameter is fully documented as the project to act on with a default of the open project. The description does not add any additional meaning about how projectId affects redo history or whether undo stacks are per-project, so it remains at the baseline.

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 states a specific verb, "Redo," and target, "the edit you last undid," so the action is immediately understandable. It is distinguishable from its opposite sibling, undo, by implication, but it does not explicitly name that sibling to remove all doubt.

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 phrase "the edit you last undid" implies this should be used after an undo operation, which gives basic contextual guidance. However, it does not explicitly say when not to use it, what happens when there is nothing to redo, or name undo as the counterpart alternative.

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