node_add

Instance a node of the given class under a parent path (undoable). Returns the new node

SERVERGodot Breakpoint SOURCEjlivingston-Cipher/godot-breakpoint-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/godot-breakpoint-mcp/node-add.md

WHAT IT DOES

What node_add does on Godot Breakpoint

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

RISK

Why node_add is rated Medium

This tool creates new scene nodes, which is a Write operation—it modifies the scene structure reversibly. The explicit mention of 'undoable' confirms the action can be reverted, distinguishing it from Destructive. The severity is medium because incorrect node instantiation could corrupt scene layouts or cause runtime errors, but the reversibility and lack of external system impact limit blast radius.

From the tool's definition Tool description states 'Instance a node' and 'undoable', indicating it creates new nodes in the scene tree with reversible effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs node_add safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Godot Breakpoint, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For node_add, this is the rule to start with:

node_add Rate-limited

node_add 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": {
    "node_add": {
      "limits": [
        {
          "counter": "node_add_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Godot Breakpoint, apply this rule, and every node_add call is checked against it from then on.

FAQ

Questions about node_add

What does the node_add tool do? +

Instance a node of the given class under a parent path (undoable). Returns the new node. It is categorised as a Write tool in the Godot Breakpoint MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on node_add? +

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

What risk level is node_add? +

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

Can I rate-limit node_add? +

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

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

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

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