rename_nfregex_service · Firegex MCP: Risk & Policy

WHAT IT DOES

What rename_nfregex_service does on Firegex

AI agents use rename_nfregex_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_nfregex_service needs a policy

Renaming a service modifies its metadata/configuration in a reversible manner without deleting data or executing external operations. This is a write operation. Severity is medium because renaming a firewall/proxy service could cause operational disruption if the new name conflicts with existing services or breaks downstream references, but the change itself is reversible and does not destroy data or move money.

From the tool's definition Tool name 'rename_nfregex_service' and description 'Rename a service' indicate modification of existing service configuration metadata.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

rename_nfregex_service Rate-limited

rename_nfregex_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_nfregex_service": {
      "limits": [
        {
          "counter": "rename_nfregex_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_nfregex_service

What does the rename_nfregex_service tool do? +

Rename a service. 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_nfregex_service? +

Register the Firegex MCP server in PolicyLayer and add a rule for rename_nfregex_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_nfregex_service? +

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

Can I rate-limit rename_nfregex_service? +

Yes. Add a rate_limit block to the rename_nfregex_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_nfregex_service completely? +

Set action: deny in the PolicyLayer policy for rename_nfregex_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_nfregex_service? +

rename_nfregex_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.