upgrade_kiln · Kiln MCP: Risk & Policy

WHAT IT DOES

What upgrade_kiln does on Kiln

AI agents invoke upgrade_kiln 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 upgrade_kiln needs a policy

The name 'upgrade_kiln' strongly implies a firmware or software upgrade operation on a 3D printer system, which would be an Execute-class action with high blast radius — a bad upgrade could brick hardware or disrupt ongoing prints. However, the empty description lowers confidence significantly. Severity is rated high due to potential hardware impact.

From the tool's definition Tool name 'upgrade_kiln' on a server controlling 3D printers; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

upgrade_kiln Rate-limited

upgrade_kiln 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": {
    "upgrade_kiln": {
      "limits": [
        {
          "counter": "upgrade_kiln_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 upgrade_kiln

What does the upgrade_kiln tool do? +

upgrade_kiln. 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 upgrade_kiln? +

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

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

Can I rate-limit upgrade_kiln? +

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

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

upgrade_kiln 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.