logout

THE RISK

Critical Risk

Why logout needs a policy

This tool terminates the active WhatsApp session and clears it, which is an irreversible action — the session is destroyed and cannot be recovered. Re-authenticating requires going through the QR code flow again. Misuse by an AI agent could disrupt communication access entirely, making it high severity with a Destructive classification.

From the tool's definition Logout from WhatsApp and clear the current session

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

POLICY

How to control logout

PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Whatsapp Web, and nothing reaches the server without passing your rules. This is the rule we recommend for logout:

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "logout"
  ]
}

logout disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

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

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Mcp Whatsapp Web tools

Write send_media Send media (image, video, document, audio) via WhatsApp. Write send_message Send a WhatsApp text message to a person or group. Read check_auth_status Check if the WhatsApp client is authenticated and connected Read download_media Download media from a WhatsApp message and return its content. Read get_chat_by_id Get WhatsApp chat metadata by JID. Read get_contact_by_id Get contact details by JID. Read get_direct_chat_by_contact_number Get direct WhatsApp chat JID by contact phone number (less reliable, use get_chat_by_id if Read get_last_interaction Get the most recent message involving a specific contact or group JID.

All 16 Mcp Whatsapp Web tools →

Destructive tools on other servers

Android Forensics ADB MCP Server create_full_backup 0xarchive web3_revoke_key Frida Game Hacking MCP clear_scan cPanel MCP Server clear_spam_box

Go deeper

Critical-risk tools in Mcp Whatsapp Web → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-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.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about logout

What does the logout tool do? +

Logout from WhatsApp and clear the current session. It is categorised as a Destructive tool in the Mcp Whatsapp Web MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on logout? +

Register the Mcp Whatsapp Web MCP server in PolicyLayer and add a rule for logout: 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 Mcp Whatsapp Web. Nothing to install.

What risk level is logout? +

logout is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit logout? +

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

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

logout is provided by the Mcp Whatsapp Web MCP server (mario-andreschak/mcp-whatsapp-web). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Mcp Whatsapp Web tool call.

Start from Mcp Whatsapp Web, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →