undo · Maige 3d MCP: Risk & Policy

WHAT IT DOES

What undo does on Maige 3d

AI agents use undo to create or update resources in Maige 3d — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Maige 3d environment.

WHY IT NEEDS A POLICY

Why undo needs a policy

Undo operations modify the current state by reverting to a prior one, but the reversion itself is reversible and non-destructive—users can redo an undo. This falls under Write rather than Destructive because the operation does not permanently erase data and can be undone.

From the tool's definition The tool 'undo' reverses the last scene change (up to 20 levels), which is a reversible modification operation that restores a previous state of 3D scene data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

undo Rate-limited

undo stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "undo": {
      "limits": [
        {
          "counter": "undo_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Maige 3d, so you can run agents against it safely.

FAQ

Questions about undo

What does the undo tool do? +

Undo the last scene change (up to 20 levels). It is categorised as a Write tool in the Maige 3d MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on undo? +

Register the Maige 3d MCP server in PolicyLayer and add a rule for undo: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Maige 3d. Nothing to install.

What risk level is undo? +

undo is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit undo? +

Yes. Add a rate_limit block to the undo rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block undo completely? +

Set action: deny in the PolicyLayer policy for undo. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides undo? +

undo is provided by the Maige 3d MCP server (m-ai-gexr/mcp-webgpu). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.