select_vpn · VPN As A Service MCP: Risk & Policy

WHAT IT DOES

What select_vpn does on VPN As A Service MCP

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

WHY IT NEEDS A POLICY

Why select_vpn needs a policy

This tool modifies the active VPN configuration by selecting which downloaded VPN to use. It changes system state (which VPN is active) but does not delete or irreversibly destroy data, and does not execute arbitrary code or move money. It is a reversible configuration change, placing it in the Write category. Misuse could route traffic through an unintended VPN, making severity medium.

From the tool's definition "Select the VPN to use among the downloaded configurations"

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

select_vpn Rate-limited

select_vpn 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": {
    "select_vpn": {
      "limits": [
        {
          "counter": "select_vpn_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 VPN As A Service MCP, so you can run agents against it safely.

FAQ

Questions about select_vpn

What does the select_vpn tool do? +

Select the VPN to use among the downloaded configurations. It is categorised as a Write tool in the VPN As A Service 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 select_vpn? +

Register the VPN As A Service MCP server in PolicyLayer and add a rule for select_vpn: 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 VPN As A Service MCP. Nothing to install.

What risk level is select_vpn? +

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

Can I rate-limit select_vpn? +

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

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

select_vpn is provided by the VPN As A Service MCP server (nolaan/ai_vpn_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.