enable_plugin · Unreal MCP: Risk & Policy

WHAT IT DOES

What enable_plugin does on Unreal

AI agents use enable_plugin 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 enable_plugin needs a policy

This tool modifies the .uproject configuration file to enable a plugin. While technically reversible (the plugin can be disabled again), enabling an untrusted or malicious plugin could have serious security implications. It doesn't delete data, but it does persistently modify project configuration and could introduce new attack surfaces or functionality.

From the tool's definition 'Enable a plugin in the .uproject file' — modifies the project configuration file to activate a plugin

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

enable_plugin Rate-limited

enable_plugin 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": {
    "enable_plugin": {
      "limits": [
        {
          "counter": "enable_plugin_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 enable_plugin

What does the enable_plugin tool do? +

Enable a plugin in the .uproject file. Requires editor restart to take effect. 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 enable_plugin? +

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

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

Can I rate-limit enable_plugin? +

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

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

enable_plugin 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.