Low Risk

listMonitors

Retrieves configuration details for all monitors (URLs, check intervals, notification settings, etc.). Use this when you need to examine or modify monitor settings. For status checks (

Part of the Mcp Uptime Kuma server.

listMonitors is read-only, but an agent in a loop can still rack up calls and cost. PolicyLayer caps every call before it runs. Live in minutes.

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AI agents call listMonitors to retrieve information from Mcp Uptime Kuma without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.

Even though listMonitors only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.

Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "listMonitors": {}
  }
}

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Get this rule live on your own Mcp Uptime Kuma server in minutes. PolicyLayer enforces it on every call, before it runs.

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These attack patterns abuse exactly the kind of access listMonitors gives an agent. Each links to the full case and the policy that stops it:

Browse the full MCP Attack Database →

Every attack above starts with a tool call. PolicyLayer checks each one against your policy first, so listMonitors only ever does what you allow.

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Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.

What does the listMonitors tool do? +

Retrieves configuration details for all monitors (URLs, check intervals, notification settings, etc.). Use this when you need to examine or modify monitor settings. For status checks (. It is categorised as a Read tool in the Mcp Uptime Kuma MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on listMonitors? +

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

What risk level is listMonitors? +

listMonitors is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit listMonitors? +

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

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

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

Enforce policy on every Mcp Uptime Kuma tool call.

Deterministic rules across all 22 Mcp Uptime Kuma tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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