set_actor_transform · Unreal MCP: Risk & Policy

WHAT IT DOES

What set_actor_transform does on Unreal

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

WHY IT NEEDS A POLICY

Why set_actor_transform needs a policy

This tool modifies the transform (position, rotation, scale) of an actor in the Unreal Engine scene. It creates a reversible change to scene data — the actor can be moved back. This is a Write operation. Misuse could displace or misalign actors in a scene, but it is not irreversible and does not execute code or affect finances.

From the tool's definition Set the location, rotation, and/or scale of an actor

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_actor_transform Rate-limited

set_actor_transform 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": {
    "set_actor_transform": {
      "limits": [
        {
          "counter": "set_actor_transform_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 Unreal, so you can run agents against it safely.

FAQ

Questions about set_actor_transform

What does the set_actor_transform tool do? +

Set the location, rotation, and/or scale of an actor. It is categorised as a Write tool in the Unreal MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_actor_transform? +

Register the Unreal MCP server in PolicyLayer and add a rule for set_actor_transform: 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 Unreal. Nothing to install.

What risk level is set_actor_transform? +

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

Can I rate-limit set_actor_transform? +

Yes. Add a rate_limit block to the set_actor_transform 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 set_actor_transform completely? +

Set action: deny in the PolicyLayer policy for set_actor_transform. 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 set_actor_transform? +

set_actor_transform is provided by the Unreal MCP server (sam-david/unreal-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

// THE FULL RECORD

set_actor_transform is one line of Unreal's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

Teams ship this data inside their own products. See what a licence covers →