Get direct WhatsApp chat JID by contact phone number (less reliable, use get_chat_by_id if JID is known).
AI agents call get_direct_chat_by_contact_number 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 performs a lookup/query operation to retrieve a chat identifier based on a phone number. It has no side effects—it does not create, modify, delete, or execute anything. The note that it is 'less reliable' than an alternative simply indicates lookup methodology, not functional category. Classification as Read is appropriate for data retrieval with no state changes.
From the tool's definition Tool description states 'Get direct WhatsApp chat JID by contact phone number', which is a retrieval operation with no modification, deletion, or execution capability. It returns an identifier (JID) for an existing chat.
Attacks that exploit this kind of access
Get direct WhatsApp chat JID by contact phone number (less reliable, use get_chat_by_id if JID is known). 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 get_direct_chat_by_contact_number: 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.
get_direct_chat_by_contact_number 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 get_direct_chat_by_contact_number 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 get_direct_chat_by_contact_number. 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.
get_direct_chat_by_contact_number 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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