This record as markdown: /tools/yanhuifair-godot-mcp/create-joint.md
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.
| 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 create_joint is rated Medium
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
The rule that runs create_joint 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 create_joint, this is the rule to start with:
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.
The button opens the PolicyLayer dashboard: create your workspace, connect Godot, apply this rule, and every create_joint call is checked against it from then on.
Questions about create_joint
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.
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.
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.
create_joint 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 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.
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.
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.
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