List group chats only.
AI agents call list_groups to retrieve information from WhatsApp MCP Stream without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or enumerates group chat information without side effects. It performs a read-only query operation. While the context involves WhatsApp (a messaging platform with potential privacy sensitivity), the tool itself does not modify data, execute code, delete records, or transfer funds.
From the tool's definition Tool name 'list_groups' and description 'List group chats only' indicate retrieval of existing data without modification, deletion, or execution of actions.
Attacks that exploit this kind of access
List group chats only. It is categorised as a Read tool in the WhatsApp MCP Stream MCP Server, which means it retrieves data without modifying state.
Register the WhatsApp MCP Stream MCP server in PolicyLayer and add a rule for list_groups: 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 WhatsApp MCP Stream. Nothing to install.
list_groups is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_groups 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.
Set action: deny in the PolicyLayer policy for list_groups. 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.
list_groups is provided by the WhatsApp MCP Stream MCP server (loglux/whatsapp-mcp-stream). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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