create_3d_model · OpenSCAD MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_3d_model does on OpenSCAD MCP Server

AI agents invoke create_3d_model to trigger actions in OpenSCAD MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why create_3d_model needs a policy

This tool executes a multi-step external operation: parsing natural language, generating OpenSCAD code, and potentially invoking remote processing or AI services. It is not a simple read or write — it triggers code execution and external compute pipelines. Misuse could consume significant resources or generate unintended 3D artifacts for printing.

From the tool's definition 'Create a 3D model from a natural language description' — triggers external processing pipeline (OpenSCAD generation, possibly AI image generation and remote processing as described in server description)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_3d_model Rate-limited

create_3d_model stays usable, but rate-capped — a runaway agent can't fire it dozens of times 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_3d_model": {
      "limits": [
        {
          "counter": "create_3d_model_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches OpenSCAD MCP Server, so you can run agents against it safely.

FAQ

Questions about create_3d_model

What does the create_3d_model tool do? +

Create a 3D model from a natural language description. It is categorised as a Execute tool in the OpenSCAD MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on create_3d_model? +

Register the OpenSCAD MCP Server MCP server in PolicyLayer and add a rule for create_3d_model: 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 OpenSCAD MCP Server. Nothing to install.

What risk level is create_3d_model? +

create_3d_model is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit create_3d_model? +

Yes. Add a rate_limit block to the create_3d_model 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_3d_model completely? +

Set action: deny in the PolicyLayer policy for create_3d_model. 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_3d_model? +

create_3d_model is provided by the OpenSCAD MCP Server MCP server (jhacksman/openscad-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.