pfsense_create_system_certificate

WHAT IT DOES

What pfsense_create_system_certificate does on Pfsense

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

WHY IT NEEDS A POLICY

Why pfsense_create_system_certificate needs a policy

The 'create' prefix indicates a Write operation that generates new certificate objects in the pfSense system. This is reversible (certificates can be deleted/replaced). However, severity is elevated to 'high' because improper certificate creation on a firewall could disrupt encrypted communications, VPN functionality, or administrative access, impacting system security and availability.

From the tool's definition Tool name includes 'create' and operates on pfSense system via REST API v2; description is empty but context indicates it creates/adds system certificates on a firewall appliance

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pfsense_create_system_certificate Rate-limited

pfsense_create_system_certificate 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": {
    "pfsense_create_system_certificate": {
      "limits": [
        {
          "counter": "pfsense_create_system_certificate_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 Pfsense, so you can run agents against it safely.

FAQ

Questions about pfsense_create_system_certificate

What does the pfsense_create_system_certificate tool do? +

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

How do I enforce a policy on pfsense_create_system_certificate? +

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

What risk level is pfsense_create_system_certificate? +

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

Can I rate-limit pfsense_create_system_certificate? +

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

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

pfsense_create_system_certificate is provided by the Pfsense MCP server (abl030/pfsense-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.