add_track · Unreal MCP: Risk & Policy

WHAT IT DOES

What add_track does on Unreal

AI agents use add_track 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 add_track needs a policy

This tool creates new data (a track) within an existing sequence, which is a reversible modification. It does not execute arbitrary operations, delete data, or move money. The blast radius is medium because misconfiguring tracks could corrupt a sequence project state, but changes are typically undoable in Unreal Engine's undo system.

From the tool's definition Tool name is 'add_track' and description states it will 'Add a track to an actor binding in a sequence' — this creates a new track object within a sequencer binding, modifying the sequence structure.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_track Rate-limited

add_track 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": {
    "add_track": {
      "limits": [
        {
          "counter": "add_track_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 add_track

What does the add_track tool do? +

Add a track to an actor binding in a sequence. 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 add_track? +

Register the Unreal MCP server in PolicyLayer and add a rule for add_track: 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 add_track? +

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

Can I rate-limit add_track? +

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

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

add_track 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.