replace_node_type · Godot MCP Server MCP: Risk & Policy

WHAT IT DOES

What replace_node_type does on Godot MCP Server

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

WHY IT NEEDS A POLICY

Why replace_node_type needs a policy

The tool modifies game scene data by replacing nodes, which is a Write operation (creates/modifies data reversibly). It's not Execute because it doesn't run arbitrary code or shell commands. It's not Destructive because children and position are preserved, and the operation is reversible (the original node type can be restored).

From the tool's definition Tool description states 'Replace a node with a new node of a different type (preserving children and position)' — this modifies the scene tree by substituting node types, a reversible write operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

replace_node_type Rate-limited

replace_node_type 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": {
    "replace_node_type": {
      "limits": [
        {
          "counter": "replace_node_type_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 Server, so you can run agents against it safely.

FAQ

Questions about replace_node_type

What does the replace_node_type tool do? +

Replace a node with a new node of a different type (preserving children and position). It is categorised as a Write tool in the Godot MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on replace_node_type? +

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

What risk level is replace_node_type? +

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

Can I rate-limit replace_node_type? +

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

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

replace_node_type is provided by the Godot MCP Server MCP server (neondeex/godotmcp-pro-free-client). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.