reboot_clock · Ulanzi MCP: Risk & Policy

WHAT IT DOES

What reboot_clock does on Ulanzi

AI agents invoke reboot_clock to trigger actions in Ulanzi. 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 reboot_clock needs a policy

Rebooting a physical device is an external operation that causes a service interruption. It is not a simple data read or write, nor is it permanently destructive, but it executes a significant hardware-level action that disrupts availability. Misuse could cause repeated disruptions to the device's operation.

From the tool's definition 'Reboot the clock' — triggers an external hardware operation (system reboot) on the Ulanzi TC001 device

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

reboot_clock Rate-limited

reboot_clock 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": {
    "reboot_clock": {
      "limits": [
        {
          "counter": "reboot_clock_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 Ulanzi, so you can run agents against it safely.

FAQ

Questions about reboot_clock

What does the reboot_clock tool do? +

Reboot the clock. It is categorised as a Execute tool in the Ulanzi MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on reboot_clock? +

Register the Ulanzi MCP server in PolicyLayer and add a rule for reboot_clock: 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 Ulanzi. Nothing to install.

What risk level is reboot_clock? +

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

Can I rate-limit reboot_clock? +

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

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

reboot_clock is provided by the Ulanzi MCP server (jelloeater/ulanzi-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.