smart_reprint · Kiln MCP: Risk & Policy

WHAT IT DOES

What smart_reprint does on Kiln

AI agents invoke smart_reprint 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 smart_reprint needs a policy

Given the server context (controlling 3D printers via OctoPrint, Moonraker, Bambu, Prusa, Elegoo), 'smart_reprint' most likely triggers a reprint job on a physical 3D printer, which is an external operation with real-world effects (material consumption, hardware operation, potential safety implications). This maps to Execute.

From the tool's definition Tool name 'smart_reprint' on a 3D printer control server (Kiln — AI agent control of 3D printers). Description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

smart_reprint Rate-limited

smart_reprint 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": {
    "smart_reprint": {
      "limits": [
        {
          "counter": "smart_reprint_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 smart_reprint

What does the smart_reprint tool do? +

smart_reprint. 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 smart_reprint? +

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

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

Can I rate-limit smart_reprint? +

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

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

smart_reprint 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.

// THE FULL RECORD

smart_reprint is one line of Kiln's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

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