get_vpn_server_users

THE RISK

Low Risk

Why get_vpn_server_users needs a policy

This tool retrieves information about VPN server user accounts without modifying, deleting, or executing anything. It is a read-only operation that queries existing configuration data. The confidentiality of the user list has minor security implications but falls well within the Read category.

From the tool's definition Tool name 'get_vpn_server_users' and description 'Get list of users authorized to connect to VPN servers' indicate a query/retrieval operation with no side effects.

Documented attack patterns abuse exactly the kind of access get_vpn_server_users gives an agent:

POLICY

How to control get_vpn_server_users

PolicyLayer is an MCP gateway — it sits between your AI agents and ASUS Merlin Router MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_vpn_server_users:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_vpn_server_users": {}
  }
}

get_vpn_server_users is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register ASUS Merlin Router MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More ASUS Merlin Router MCP Server tools

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All 47 ASUS Merlin Router MCP Server tools →

Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_vpn_server_users

What does the get_vpn_server_users tool do? +

Get list of users authorized to connect to VPN servers. It is categorised as a Read tool in the ASUS Merlin Router MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_vpn_server_users? +

Register the ASUS Merlin Router MCP Server MCP server in PolicyLayer and add a rule for get_vpn_server_users: 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 ASUS Merlin Router MCP Server. Nothing to install.

What risk level is get_vpn_server_users? +

get_vpn_server_users is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_vpn_server_users? +

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

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

get_vpn_server_users is provided by the ASUS Merlin Router MCP Server MCP server (kcsoukup/asus-merlin-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every ASUS Merlin Router MCP Server tool call.

Start from ASUS Merlin Router MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →