disable_plugin · Unreal MCP: Risk & Policy

WHAT IT DOES

What disable_plugin does on Unreal

AI agents use disable_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 disable_plugin needs a policy

This tool modifies the .uproject project configuration file by disabling plugins, which affects the Unreal Engine project state. While reversible (the plugin can be re-enabled), it alters critical project configuration that controls which functionality is available. The impact is high because disabling plugins could break project functionality or dependencies, but not irreversible like deletion.

From the tool's definition Tool description states "Disable a plugin in the .uproject file" — modifies project configuration file. Changes are reversible (plugin can be re-enabled), distinguishing from destructive operations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

disable_plugin Rate-limited

disable_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": {
    "disable_plugin": {
      "limits": [
        {
          "counter": "disable_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 disable_plugin

What does the disable_plugin tool do? +

Disable 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 disable_plugin? +

Register the Unreal MCP server in PolicyLayer and add a rule for disable_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 disable_plugin? +

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

Can I rate-limit disable_plugin? +

Yes. Add a rate_limit block to the disable_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 disable_plugin completely? +

Set action: deny in the PolicyLayer policy for disable_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 disable_plugin? +

disable_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.