waha_leave_group

THE RISK

Critical Risk

Why waha_leave_group needs a policy

Leaving a group is a one-way, irreversible action: once the agent leaves, it loses access to the group chat, its history, and membership. There is no 'undo' — rejoining requires a new invite link or admin approval. This matches the Destructive category due to the permanent and unrecoverable nature of the action.

From the tool's definition 'Leave a group' — permanently exits the agent from a WhatsApp group, which is an irreversible action (cannot rejoin without a new invitation).

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

POLICY

How to control waha_leave_group

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

policy.json

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

waha_leave_group 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 WAHA 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.

RESTRICT THIS TOOL →

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EXPLORE

Related tools and policies

More WAHA MCP Server tools

Destructive waha_clear_chat_messages Clear all messages from a chat. WARNING: This is a destructive operation that cannot be un Destructive waha_delete_chat Delete a chat completely. WARNING: This is a destructive operation that cannot be undone. Destructive waha_delete_group_picture Remove group profile picture. Destructive waha_delete_message Delete a specific message from a chat. This is a destructive operation and cannot be undon Destructive waha_remove_group_participants Remove member(s) from a group. Requires admin privileges. Execute waha_revoke_group_invite_code Revoke current invite link and generate a new one. Requires admin privileges. Write waha_demote_group_admin Remove admin privileges from participant(s). Requires admin privileges. Write waha_react_to_message Add an emoji reaction to a message. To remove a reaction, send an empty string.

All 52 WAHA MCP Server tools →

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Go deeper

Critical-risk tools in WAHA MCP Server → 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 waha_leave_group

What does the waha_leave_group tool do? +

Leave a group. It is categorised as a Destructive tool in the WAHA MCP Server 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 waha_leave_group? +

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

What risk level is waha_leave_group? +

waha_leave_group 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 waha_leave_group? +

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

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

waha_leave_group is provided by the WAHA MCP Server MCP server (seejux/waha-whatsapp-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every WAHA MCP Server tool call.

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

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