Search across all WhatsApp message history. Supports full-text search, date ranges, sender filtering, and message type filtering. Args: - search: Text to search for (case insensitive, supports Portuguese/unicode) - contactId: Scope search to one contact (phone digits or
AI agents call whatsapp_search_messages to retrieve information from Waha without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries existing message data without side effects. It enables searching through chat history with various filters, which is fundamentally a read operation.
From the tool's definition Tool description states 'Search across all WhatsApp message history' with filtering capabilities (date ranges, sender filtering, message type filtering). The arguments show 'search' for text queries and 'contactId' for scoping.
Attacks that exploit this kind of access
Search across all WhatsApp message history. Supports full-text search, date ranges, sender filtering, and message type filtering. Args: - search: Text to search for (case insensitive, supports Portuguese/unicode) - contactId: Scope search to one contact (phone digits or. It is categorised as a Read tool in the Waha MCP Server, which means it retrieves data without modifying state.
Register the Waha MCP server in PolicyLayer and add a rule for whatsapp_search_messages: 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. Nothing to install.
whatsapp_search_messages 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 whatsapp_search_messages 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 whatsapp_search_messages. 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.
whatsapp_search_messages is provided by the Waha MCP server (@marcos-heidemann/waha-mcp-server). 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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