create_visual_shader · Godot MCP: Risk & Policy

WHAT IT DOES

What create_visual_shader does on Godot

AI agents use create_visual_shader 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
`path`	string	Yes	Output path for new VisualShader .tres
`shader_type`	string	Yes	Shader mode

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why create_visual_shader needs a policy

This tool creates a new VisualShader resource file (.tres format), which is a data creation action. It modifies the project state by adding a new asset but does not execute arbitrary code, delete existing data, or move money.

From the tool's definition 'Create a new VisualShader .tres graph file' — the tool creates a new file artifact in the Godot project, a reversible write operation.

Risk signalsAccepts file system path (path)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_visual_shader Rate-limited

create_visual_shader 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_visual_shader": {
      "limits": [
        {
          "counter": "create_visual_shader_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_visual_shader

What does the create_visual_shader tool do? +

Create a new VisualShader .tres graph file. 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_visual_shader accept? +

create_visual_shader accepts 2 parameters: path, shader_type. Required: path, shader_type. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on create_visual_shader? +

Register the Godot MCP server in PolicyLayer and add a rule for create_visual_shader: 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_visual_shader? +

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

Can I rate-limit create_visual_shader? +

Yes. Add a rate_limit block to the create_visual_shader 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_visual_shader completely? +

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

create_visual_shader 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.