multi_material_print · Kiln MCP: Risk & Policy

WHAT IT DOES

What multi_material_print does on Kiln

AI agents invoke multi_material_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 multi_material_print needs a policy

Based on context of the server (3D printer control) and the tool name, this tool likely initiates a multi-material print job on a physical 3D printer. This is an Execute-category action — it triggers an external physical operation (running a printer). Misuse could waste materials, damage hardware, or produce unintended physical output. Confidence is reduced due to the empty description.

From the tool's definition Tool name 'multi_material_print' on a server described as 'AI agent control of 3D printers'; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

multi_material_print Rate-limited

multi_material_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": {
    "multi_material_print": {
      "limits": [
        {
          "counter": "multi_material_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 multi_material_print

What does the multi_material_print tool do? +

multi_material_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 multi_material_print? +

Register the Kiln MCP server in PolicyLayer and add a rule for multi_material_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 multi_material_print? +

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

Can I rate-limit multi_material_print? +

Yes. Add a rate_limit block to the multi_material_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 multi_material_print completely? +

Set action: deny in the PolicyLayer policy for multi_material_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 multi_material_print? +

multi_material_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.