create_fabric_connection · Equinix Fabric MCP: Risk & Policy

WHAT IT DOES

What create_fabric_connection does on Equinix Fabric MCP

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

WHY IT NEEDS A POLICY

Why create_fabric_connection needs a policy

This tool creates new network connections in production infrastructure, which is a write operation that modifies system state. While the changes are theoretically reversible (via delete_fabric_connection), unauthorized creation of network connections between endpoints could enable lateral movement, data exfiltration, or network segmentation bypass in critical infrastructure.

From the tool's definition Tool name 'create_fabric_connection' and description 'Creates a new Fabric virtual connection' indicate data creation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_fabric_connection Rate-limited

create_fabric_connection 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_fabric_connection": {
      "limits": [
        {
          "counter": "create_fabric_connection_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 Equinix Fabric MCP, so you can run agents against it safely.

FAQ

Questions about create_fabric_connection

What does the create_fabric_connection tool do? +

Creates a new Fabric virtual connection between two endpoints (ports, service profiles, or cloud providers). Returns the created connection with UUID and initial state. It is categorised as a Write tool in the Equinix Fabric MCP 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_fabric_connection? +

Register the Equinix Fabric MCP server in PolicyLayer and add a rule for create_fabric_connection: 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 Equinix Fabric MCP. Nothing to install.

What risk level is create_fabric_connection? +

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

Can I rate-limit create_fabric_connection? +

Yes. Add a rate_limit block to the create_fabric_connection 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_fabric_connection completely? +

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

create_fabric_connection is provided by the Equinix Fabric MCP server (sliuuu/equinix-fabric-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.