rename_phj_service · Firegex MCP: Risk & Policy

WHAT IT DOES

What rename_phj_service does on Firegex

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

WHY IT NEEDS A POLICY

Why rename_phj_service needs a policy

This tool modifies configuration data (a porthijack service rule name) without deleting it, making it Write rather than Destructive. However, severity is elevated to 'high' because misconfiguration of firewall/proxy rules could impact network security posture, traffic routing, or security policy enforcement.

From the tool's definition Tool description states it 'Rename a porthijack rule' — this modifies an existing rule/configuration in what appears to be a firewall/proxy system. The action is reversible (a rule can be renamed back), but affects active security infrastructure.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

rename_phj_service Rate-limited

rename_phj_service 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": {
    "rename_phj_service": {
      "limits": [
        {
          "counter": "rename_phj_service_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about rename_phj_service

What does the rename_phj_service tool do? +

Rename a porthijack rule. It is categorised as a Write tool in the Firegex MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on rename_phj_service? +

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

What risk level is rename_phj_service? +

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

Can I rate-limit rename_phj_service? +

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

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

rename_phj_service is provided by the Firegex MCP server (umbra2728/firegex-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.