Reload · P MCP: Risk & Policy

WHAT IT DOES

What Reload does on Pmcp

AI agents invoke Reload to trigger actions in Pmcp. 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 Reload needs a policy

Reload triggers real processes with real consequences. An agent gone sideways doesn't fire it once — it starts dozens of builds, sends mass notifications, or burns through compute before anyone looks up.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

Reload Rate-limited

Reload 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": {
    "Reload": {
      "limits": [
        {
          "counter": "reload_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 Pmcp, so you can run agents against it safely.

FAQ

Questions about Reload

What does the Reload tool do? +

Trigger a reload of the Prometheus configuration and rule files. It is categorised as a Execute tool in the Pmcp MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on Reload? +

Register the P MCP server in PolicyLayer and add a rule for Reload: 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 Pmcp. Nothing to install.

What risk level is Reload? +

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

Can I rate-limit Reload? +

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

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

Reload is provided by the P MCP server (yshngg/prometheus-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.