compile_scad · Kiln MCP: Risk & Policy

WHAT IT DOES

What compile_scad does on Kiln

AI agents invoke compile_scad to trigger actions in Kiln. 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 compile_scad needs a policy

OpenSCAD is a parametric CAD language; compiling .scad files executes code that generates 3D models. In the context of a 3D printer control server (OctoPrint, Moonraker, Bambu, Prusa, Elegoo), this likely translates compiled output to printer commands. Code compilation is an Execute operation with high severity due to potential for malicious CAD design output or resource exhaustion.

From the tool's definition Tool name 'compile_scad' indicates compilation of OpenSCAD files. No description provided.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

compile_scad Rate-limited

compile_scad 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": {
    "compile_scad": {
      "limits": [
        {
          "counter": "compile_scad_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 Kiln, so you can run agents against it safely.

FAQ

Questions about compile_scad

What does the compile_scad tool do? +

compile_scad. It is categorised as a Execute tool in the Kiln MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on compile_scad? +

Register the Kiln MCP server in PolicyLayer and add a rule for compile_scad: 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 Kiln. Nothing to install.

What risk level is compile_scad? +

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

Can I rate-limit compile_scad? +

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

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

compile_scad is provided by the Kiln MCP server (codeofaxel/Kiln). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.