modify_scad_module · Kiln MCP: Risk & Policy

WHAT IT DOES

What modify_scad_module does on Kiln

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

WHY IT NEEDS A POLICY

Why modify_scad_module needs a policy

The tool modifies OpenSCAD modules (scad_module), which are reversible code/data changes. This is a Write operation rather than Execute because it manipulates design files rather than running/executing print jobs. It ranks above Read (creates/modifies data) but below Destructive (reversible).

From the tool's definition Tool name 'modify_scad_module' indicates modification of OpenSCAD module code. Empty description limits confidence but 'modify' clearly denotes a write operation on design files.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

modify_scad_module Rate-limited

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

FAQ

Questions about modify_scad_module

What does the modify_scad_module tool do? +

modify_scad_module. It is categorised as a Write tool in the Kiln MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on modify_scad_module? +

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

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

Can I rate-limit modify_scad_module? +

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

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

modify_scad_module 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.