fix_redirectors · Unreal MCP: Risk & Policy

WHAT IT DOES

What fix_redirectors does on Unreal

AI agents use fix_redirectors 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 fix_redirectors needs a policy

This tool modifies project data (asset redirectors) but does so reversibly through the standard FixUpRedirects commandlet, which updates references and cleans up redirect chains. It does not delete or permanently overwrite assets, but rather repairs and optimizes asset references.

From the tool's definition The tool description states it 'Clean up asset redirectors in the project (runs FixUpRedirects commandlet).' This modifies the asset database by processing and resolving asset redirectors, which are internal references created when assets are moved or renamed.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

fix_redirectors Rate-limited

fix_redirectors 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": {
    "fix_redirectors": {
      "limits": [
        {
          "counter": "fix_redirectors_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 fix_redirectors

What does the fix_redirectors tool do? +

Clean up asset redirectors in the project (runs FixUpRedirects commandlet). 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 fix_redirectors? +

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

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

Can I rate-limit fix_redirectors? +

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

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

fix_redirectors 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.