Microsoft on Tuesday unveiled the expansion of its Sentinel Security Incidents and Event Management solution (SIEM) as a unified agentic platform with the general availability of the Sentinel data lake. In addition, the tech giant said it's also releasing a public preview of Sentinel Graph and Sentinel Model Context Protocol (MCP) server. Microsoft released Sentinel data lake in public preview earlier this July as a purpose-built, cloud-native tool to ingest, manage, and analyze security data to provide better visibility and advanced analytics. "Sentinel ingests signals, either structured or semi-structured, and builds a rich, contextual understanding of your digitalestate through vectorized security data and graph-based relationships," Jakkal said. Microsoft further noted that Sentinel organizes and enriches security data so as to detect issues faster and better respond to events at scale, shifting cybersecurity from "reactive to predictive."