set_actor_transform
Set the location, rotation, and/or scale of an actor.
This record as markdown: /tools/jjpxdev-unreal-mcp/set-actor-transform.md
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.
| Parameter | Type | Required | Description |
|---|---|---|---|
name | string | Yes | Actor name or label |
scale | object | — | |
location | object | — | |
rotation | object | — |
Parameters from the server's own tool schema.
Why set_actor_transform is rated Medium
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
Risk signalsHigh parameter count (13 properties)
Attacks that exploit this kind of access
The rule that runs set_actor_transform safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Unreal, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For set_actor_transform, this is the rule to start with:
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.
The button opens the PolicyLayer dashboard: create your workspace, connect Unreal, apply this rule, and every set_actor_transform call is checked against it from then on.
Questions about set_actor_transform
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.
set_actor_transform accepts 4 parameters: name, scale, location, rotation. Required: name. The full parameter table on this page comes from the server's own tool schema.
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.
set_actor_transform is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
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.
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.
set_actor_transform is provided by the Unreal MCP server (@jjpxdev/unreal-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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