This record as markdown: /tools/yanhuifair-godot-mcp/add-node.md
What add_node does on Godot
AI agents use add_node to create or update resources in Godot, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Godot environment.
| Parameter | Type | Required | Description |
|---|---|---|---|
name | string | Yes | New node name |
type | string | Yes | Node type (e.g. "CharacterBody2D", "Timer", "CollisionShape3D") |
groups | object | — | Initial groups |
properties | object | — | Initial properties |
scene_path | string | Yes | Path to .tscn file |
parent_path | object | — | Parent node path (default: root level) |
Parameters from the server's own tool schema.
Why add_node is rated Medium
This tool creates and adds nodes to Godot scenes, which is a reversible modification (nodes can be deleted/removed). It does not execute arbitrary code, delete data irreversibly, or trigger external operations.
From the tool's definition Tool name 'add_node' and description 'Add a node to a scene' indicate creation of new scene elements in Godot, which modifies the scene structure reversibly.
Attacks that exploit this kind of access
The rule that runs add_node safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Godot, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For add_node, this is the rule to start with:
add_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.
The button opens the PolicyLayer dashboard: create your workspace, connect Godot, apply this rule, and every add_node call is checked against it from then on.
Questions about add_node
Add a node to a scene. It is categorised as a Write tool in the Godot MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
add_node accepts 6 parameters: name, type, groups, properties, scene_path, parent_path. Required: name, type, scene_path. The full parameter table on this page comes from the server's own tool schema.
Register the Godot MCP server in PolicyLayer and add a rule for add_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. Nothing to install.
add_node is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the add_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.
Set action: deny in the PolicyLayer policy for add_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.
add_node is provided by the Godot MCP server (@yanhuifair/godot-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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