create_address_subnet · FortiManager MCP Server MCP

WHAT IT DOES

What create_address_subnet does on FortiManager MCP Server

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

WHY IT NEEDS A POLICY

Why create_address_subnet needs a policy

This tool creates new address subnet entries in FortiManager's firewall configuration, which modifies network policies and security rules. While reversible (can be deleted/updated), it has high severity due to the critical nature of firewall configuration - misuse could alter network access controls and security posture.

From the tool's definition Tool name is 'create_address_subnet' indicating creation of network address/subnet objects. Part of FortiManager's centralized firewall policy management system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_address_subnet Rate-limited

create_address_subnet 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": {
    "create_address_subnet": {
      "limits": [
        {
          "counter": "create_address_subnet_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 FortiManager MCP Server, so you can run agents against it safely.

FAQ

Questions about create_address_subnet

What does the create_address_subnet tool do? +

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

How do I enforce a policy on create_address_subnet? +

Register the FortiManager MCP Server MCP server in PolicyLayer and add a rule for create_address_subnet: 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 FortiManager MCP Server. Nothing to install.

What risk level is create_address_subnet? +

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

Can I rate-limit create_address_subnet? +

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

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

create_address_subnet is provided by the FortiManager MCP Server MCP server (rstierli/fortimanager-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.