validate_openscad_code · Kiln MCP: Risk & Policy

WHAT IT DOES

What validate_openscad_code does on Kiln

AI agents invoke validate_openscad_code 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 validate_openscad_code needs a policy

Validating OpenSCAD code likely involves executing or interpreting the code in a sandbox to check for errors, which constitutes code execution. Given the server controls 3D printers, misuse could trigger unintended printer operations. Confidence is reduced due to empty description — it may be purely static analysis (Read), but execution is the more conservative and likely interpretation.

From the tool's definition Tool name 'validate_openscad_code' implies running/parsing OpenSCAD code; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

validate_openscad_code Rate-limited

validate_openscad_code 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": {
    "validate_openscad_code": {
      "limits": [
        {
          "counter": "validate_openscad_code_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 validate_openscad_code

What does the validate_openscad_code tool do? +

validate_openscad_code. 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 validate_openscad_code? +

Register the Kiln MCP server in PolicyLayer and add a rule for validate_openscad_code: 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 validate_openscad_code? +

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

Can I rate-limit validate_openscad_code? +

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

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

validate_openscad_code 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.