export_mesh_library · Godot MCP: Risk & Policy

WHAT IT DOES

What export_mesh_library does on Godot MCP

AI agents use export_mesh_library to create or update resources in Godot MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Godot MCP environment.

WHY IT NEEDS A POLICY

Why export_mesh_library needs a policy

This tool creates or outputs a new MeshLibrary resource file based on a scene. While it doesn't modify the original scene (reversible), it does generate and write a new asset file to the Godot project. This is a Write operation—it creates new data artifacts.

From the tool's definition Tool name contains 'export' and description states 'Export a scene as a MeshLibrary resource', which involves writing/creating a new resource file from existing scene data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

export_mesh_library Rate-limited

export_mesh_library 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": {
    "export_mesh_library": {
      "limits": [
        {
          "counter": "export_mesh_library_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Godot MCP, so you can run agents against it safely.

FAQ

Questions about export_mesh_library

What does the export_mesh_library tool do? +

Export a scene as a MeshLibrary resource. It is categorised as a Write tool in the Godot MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on export_mesh_library? +

Register the Godot MCP server in PolicyLayer and add a rule for export_mesh_library: 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 Godot MCP. Nothing to install.

What risk level is export_mesh_library? +

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

Can I rate-limit export_mesh_library? +

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

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

export_mesh_library is provided by the Godot MCP server (jamesdowzard/godot-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.