start_monitored_print · Kiln MCP: Risk & Policy

WHAT IT DOES

What start_monitored_print does on Kiln

AI agents invoke start_monitored_print 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 start_monitored_print needs a policy

This tool triggers execution of a physical process (3D printing) whose effects depend on print parameters and design. While not immediately destructive or financial, a misconfigured or malicious print job could waste materials, damage equipment, cause fires, or create unsafe objects.

From the tool's definition Tool name 'start_monitored_print' indicates initiation of a 3D printer operation. Context: server controls physical 3D printers (OctoPrint, Moonraker, Bambu, Prusa, Elegoo).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

start_monitored_print Rate-limited

start_monitored_print 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": {
    "start_monitored_print": {
      "limits": [
        {
          "counter": "start_monitored_print_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 start_monitored_print

What does the start_monitored_print tool do? +

start_monitored_print. 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 start_monitored_print? +

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

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

Can I rate-limit start_monitored_print? +

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

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

start_monitored_print 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.