create_joint · Godot MCP: Risk & Policy

WHAT IT DOES

What create_joint does on Godot

AI agents use create_joint 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.

PARAMETERS

Parameter	Type	Required	Description
`name`	string	Yes	Joint node name
`node_a`	object	—	Node A path (first connected body)
`node_b`	object	—	Node B path (second connected body)
`joint_type`	string	Yes	Joint type
`scene_path`	string	Yes	Path to .tscn scene file
`parent_path`	object	—	Parent node path

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why create_joint needs a policy

This tool creates a physics joint, which is a reversible modification to the game world state. It adds a new object but does not execute arbitrary code, delete data, or cause financial impact.

From the tool's definition Tool name 'create_joint' and description 'Create a physics joint' indicate creation of a new physics object in the Godot Engine scene/world.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_joint Rate-limited

create_joint 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": {
    "create_joint": {
      "limits": [
        {
          "counter": "create_joint_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, so you can run agents against it safely.

FAQ

Questions about create_joint

What does the create_joint tool do? +

Create a physics joint. 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.

What parameters does create_joint accept? +

create_joint accepts 6 parameters: name, node_a, node_b, joint_type, scene_path, parent_path. Required: name, joint_type, scene_path. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on create_joint? +

Register the Godot MCP server in PolicyLayer and add a rule for create_joint: 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.

What risk level is create_joint? +

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

Can I rate-limit create_joint? +

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

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

create_joint 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.