add_vpn_user · CloudStack MCP Server MCP: Risk & Policy

WHAT IT DOES

What add_vpn_user does on CloudStack MCP Server

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

WHY IT NEEDS A POLICY

Why add_vpn_user needs a policy

This tool creates a new VPN user for remote access, which is a Write operation (creates data/credentials). It is reversible (users can be deleted or disabled). The severity is medium because misuse could grant unauthorized remote access to infrastructure, but the operation is not inherently destructive and doesn't directly execute arbitrary code or move money.

From the tool's definition Tool name 'add_vpn_user' and description 'Add VPN user for Remote Access VPN' indicate creation of a new VPN user account, which is a reversible write operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_vpn_user Rate-limited

add_vpn_user 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": {
    "add_vpn_user": {
      "limits": [
        {
          "counter": "add_vpn_user_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 CloudStack MCP Server, so you can run agents against it safely.

FAQ

Questions about add_vpn_user

What does the add_vpn_user tool do? +

Add VPN user for Remote Access VPN. It is categorised as a Write tool in the CloudStack 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 add_vpn_user? +

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

What risk level is add_vpn_user? +

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

Can I rate-limit add_vpn_user? +

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

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

add_vpn_user is provided by the CloudStack MCP Server MCP server (mozg31337/cloudstack-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.