Search messages by text, optionally within a specific chat.
AI agents call search_messages 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 and queries message data from WhatsApp chats. While it does not modify or delete data (which would elevate it to Write or Destructive), the medium severity is assigned because it enables access to potentially sensitive private messages and conversations. Misuse could expose confidential communications, personal information, or sensitive business data.
From the tool's definition Tool name 'search_messages' and description 'Search messages by text, optionally within a specific chat' indicate a retrieval operation with no modification or deletion of data. The action is a query that returns results without side effects.
Attacks that exploit this kind of access
Search messages by text, optionally within a specific chat. 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 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 WhatsApp MCP Stream. Nothing to install.
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 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 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.
search_messages 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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