instantiate_scene · Godot Mcp Pilot MCP: Risk & Policy

WHAT IT DOES

What instantiate_scene does on Godot Mcp Pilot

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

WHY IT NEEDS A POLICY

Why instantiate_scene needs a policy

This tool creates a new node instance by adding a sub-scene into an existing scene. It modifies the scene structure by adding content, which is a reversible write operation (the node can be removed). It does not execute code, delete data, or involve financial transactions.

From the tool's definition Instantiate a packed scene (sub-scene) as a child node inside another scene

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

instantiate_scene Rate-limited

instantiate_scene 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": {
    "instantiate_scene": {
      "limits": [
        {
          "counter": "instantiate_scene_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 Pilot, so you can run agents against it safely.

FAQ

Questions about instantiate_scene

What does the instantiate_scene tool do? +

Instantiate a packed scene (sub-scene) as a child node inside another scene. It is categorised as a Write tool in the Godot Mcp Pilot MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on instantiate_scene? +

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

What risk level is instantiate_scene? +

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

Can I rate-limit instantiate_scene? +

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

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

instantiate_scene is provided by the Godot Mcp Pilot MCP server (pushks18/godot-mcp-pilot). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.