Get most recent WhatsApp message involving the contact.
AI agents call get_last_interaction to retrieve information from WhatsApp MCP Automation without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves existing data (a message history entry) without creating, modifying, deleting, or executing any operations. It is purely informational and read-only, fitting the Read category. Severity is low because accessing message metadata has minimal blast radius; the worst-case misuse would be reading a recent message to which the user already has access in WhatsApp.
From the tool's definition Tool description explicitly states it 'Get[s] most recent WhatsApp message involving the contact' — a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
Get most recent WhatsApp message involving the contact. It is categorised as a Read tool in the WhatsApp MCP Automation MCP Server, which means it retrieves data without modifying state.
Register the WhatsApp MCP Automation MCP server in PolicyLayer and add a rule for get_last_interaction: 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 Automation. Nothing to install.
get_last_interaction 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_last_interaction 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_last_interaction. 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_last_interaction is provided by the WhatsApp MCP Automation MCP server (priyasogani8-star/whatsapp-mcp-automation). 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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