duplicate_node · Godot MCP Unified MCP: Risk & Policy

WHAT IT DOES

What duplicate_node does on Godot MCP Unified

AI agents use duplicate_node 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 duplicate_node needs a policy

Duplicating a node modifies the scene file by adding a new node instance, but this action is reversible (the duplicate can be deleted). It does not execute arbitrary code, delete data permanently, or move resources. It fits the Write category as it creates/modifies data reversibly.

From the tool's definition duplicate_node - 'Duplicate an existing node in a scene (.tscn file)' creates a copy of a node, which is a reversible modification to scene data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

duplicate_node Rate-limited

duplicate_node 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": {
    "duplicate_node": {
      "limits": [
        {
          "counter": "duplicate_node_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 duplicate_node

What does the duplicate_node tool do? +

Duplicate an existing 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 duplicate_node? +

Register the Godot MCP Unified MCP server in PolicyLayer and add a rule for duplicate_node: 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 duplicate_node? +

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

Can I rate-limit duplicate_node? +

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

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

duplicate_node 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.