attach_script · Godot MCP Unified MCP: Risk & Policy

WHAT IT DOES

What attach_script does on Godot MCP Unified

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

WHY IT NEEDS A POLICY

Why attach_script needs a policy

This tool creates or modifies scene data by attaching scripts to nodes. While it writes to a scene file (.tscn), it does not execute the script itself immediately (that would be Execute). The attachment is reversible (script can be detached), so it is not Destructive. Write is the appropriate category as it modifies game scene structure in a way that is typical of game development operations and reversible.

From the tool's definition Attach a GDScript to a node in a scene (.tscn file) — modifies scene structure and node properties by attaching executable code to nodes, which changes the scene file.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

attach_script Rate-limited

attach_script 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": {
    "attach_script": {
      "limits": [
        {
          "counter": "attach_script_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 Godot MCP Unified, so you can run agents against it safely.

FAQ

Questions about attach_script

What does the attach_script tool do? +

Attach a GDScript to a node in a scene (.tscn file). It is categorised as a Write tool in the Godot MCP Unified MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on attach_script? +

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

What risk level is attach_script? +

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

Can I rate-limit attach_script? +

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

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

attach_script is provided by the Godot MCP Unified MCP server (pierrealexandreguillemin-a11y/godot-mcp-unified). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.