uptime_add_monitor · Uptime Kuma MCP: Risk & Policy

WHAT IT DOES

What uptime_add_monitor does on Uptime Kuma

AI agents use uptime_add_monitor to create or update resources in Uptime Kuma — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Uptime Kuma environment.

WHY IT NEEDS A POLICY

Why uptime_add_monitor needs a policy

Creating a new monitor is a write operation that modifies the monitoring system's state by adding a new tracked resource. It is reversible (can be deleted via uptime_delete_monitor), so it does not qualify as Destructive.

From the tool's definition Tool description states 'Legt einen neuen Monitor an' (Creates a new monitor). The sibling tool 'uptime_delete_monitor' confirms this server handles monitor lifecycle management. This is a create operation that adds a new monitoring configuration.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

uptime_add_monitor Rate-limited

uptime_add_monitor stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "uptime_add_monitor": {
      "limits": [
        {
          "counter": "uptime_add_monitor_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Uptime Kuma, so you can run agents against it safely.

FAQ

Questions about uptime_add_monitor

What does the uptime_add_monitor tool do? +

Legt einen neuen Monitor an. type: http (HTTP-GET auf URL) /. It is categorised as a Write tool in the Uptime Kuma MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on uptime_add_monitor? +

Register the Uptime Kuma MCP server in PolicyLayer and add a rule for uptime_add_monitor: 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 Uptime Kuma. Nothing to install.

What risk level is uptime_add_monitor? +

uptime_add_monitor is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit uptime_add_monitor? +

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

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

uptime_add_monitor is provided by the Uptime Kuma MCP server (mbay-odw/uptime-kuma-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.