resume_print · Kiln MCP: Risk & Policy

WHAT IT DOES

What resume_print does on Kiln

AI agents invoke resume_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 resume_print needs a policy

This tool resumes a physical 3D printing operation, causing real-world hardware to begin extruding material and moving axes. It triggers an external operation whose effects depend on the current printer state. Misuse could result in physical damage to the print, wasted materials, or hardware damage if resumed under incorrect conditions.

From the tool's definition 'Resume a paused print job' — triggers an external physical operation on a 3D printer

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

resume_print Rate-limited

resume_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": {
    "resume_print": {
      "limits": [
        {
          "counter": "resume_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 resume_print

What does the resume_print tool do? +

Resume a paused print job. 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 resume_print? +

Register the Kiln MCP server in PolicyLayer and add a rule for resume_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 resume_print? +

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

Can I rate-limit resume_print? +

Yes. Add a rate_limit block to the resume_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 resume_print completely? +

Set action: deny in the PolicyLayer policy for resume_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 resume_print? +

resume_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.