assign_shader_material · Godot MCP Server MCP: Risk & Policy

WHAT IT DOES

What assign_shader_material does on Godot MCP Server

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

WHY IT NEEDS A POLICY

Why assign_shader_material needs a policy

This tool creates or modifies data reversibly by changing a node's shader material. It does not delete data (Destructive), execute arbitrary code (Execute), or involve financial transactions. While it affects the game's visual rendering, the change is non-destructive and can be undone or changed.

From the tool's definition The tool 'assign_shader_material' directly modifies a node's shader material property within the Godot editor.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

assign_shader_material Rate-limited

assign_shader_material 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": {
    "assign_shader_material": {
      "limits": [
        {
          "counter": "assign_shader_material_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 MCP Server, so you can run agents against it safely.

FAQ

Questions about assign_shader_material

What does the assign_shader_material tool do? +

Assign a shader (as a ShaderMaterial) to a node. It is categorised as a Write tool in the Godot MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on assign_shader_material? +

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

What risk level is assign_shader_material? +

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

Can I rate-limit assign_shader_material? +

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

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

assign_shader_material is provided by the Godot MCP Server MCP server (neondeex/godotmcp-pro-free-client). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.