unity_undo

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

Annotations are missing, so the description must disclose behavior. It states the tool undoes an operation, implying it is destructive (reverses state). However, it does not mention whether it can be undone itself or if it respects multi-instance safety beyond the port parameter. The port parameter description adds some transparency but is not part of the main description.

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 concise (one sentence). It could benefit from a brief note on usage context (e.g., requires a prior action). Still, it is front-loaded with the key purpose.

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?

The tool is simple with one optional parameter and no output schema. The description is adequate but lacks mention of potential failure cases (e.g., nothing to undo) or relationship to undo history. For a straightforward undo operation, it covers the basics.

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% for the single parameter. The description does not add meaning beyond the schema for the undo action itself, but the parameter description in the schema provides context for port usage. Baseline 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 undoes the last operation in Unity Editor, with a specific verb ('Undo') and resource ('last operation in Unity Editor'). Among sibling tools, unity_redo is the explicit counterpart, making the purpose distinct.

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?

No guidance on when to use this tool versus alternatives (e.g., undo history vs. redo). The description does not mention prerequisites (e.g., an operation must exist to undo) or limitations (e.g., only the last operation, not a history list).

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