interactive_login

THE RISK

High Risk

Why interactive_login needs a policy

This tool triggers an external browser action to open a login page, which constitutes executing an external operation (launching a browser UI). It does not merely read data — it initiates an interactive browser session. The severity is medium because misuse could initiate unauthorized authentication flows or be used to phish/manipulate a user into logging in under false pretenses.

From the tool's definition Open browser for manual login to N Lobby

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

POLICY

How to control interactive_login

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "interactive_login": {
      "limits": [
        {
          "counter": "interactive_login_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

interactive_login stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register N Lobby 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.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

High-risk tools in N Lobby MCP Server → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
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FAQ

Questions about interactive_login

What does the interactive_login tool do? +

Open browser for manual login to N Lobby (no credentials required). It is categorised as a Execute tool in the N Lobby MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on interactive_login? +

Register the N Lobby MCP Server MCP server in PolicyLayer and add a rule for interactive_login: 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 N Lobby MCP Server. Nothing to install.

What risk level is interactive_login? +

interactive_login is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit interactive_login? +

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

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

interactive_login is provided by the N Lobby MCP Server MCP server (minagishl/nlobby-cli). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every N Lobby MCP Server tool call.

Start from N Lobby 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 →