blender_undo

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

No annotations are provided, so the description carries the behavioral burden. The Ctrl+Z analogy adds useful context, but the description does not disclose consequences such as irreversible state changes, failure when the undo stack is empty, or that it may undo actions beyond the AI's own previous tool calls.

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?

Extremely concise and well-structured: the first sentence states the action and target, and the second sentence adds a familiar analogy. No wasted words.

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 zero-parameter tool with no output schema, the description is largely complete: an agent can determine what the tool does and invoke it without additional input. Some minor behavioral details are missing, but the simplicity of the tool lowers the burden.

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 tool has zero parameters, and the empty input schema fully covers parameter semantics. No parameter description is needed, so the baseline of 4 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 specific action: undo the last operation in Blender, with the Ctrl+Z analogy reinforcing the meaning. It does not explicitly contrast with blender_redo or other siblings, but the purpose is unambiguous.

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 intended use is implied: use this when the most recent Blender operation should be reverted. However, there is no explicit guidance about when not to use it, limitations such as repeated calls for multiple undos, or alternatives like blender_redo.

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