Connection Is Not Comprehension: Why AI Agents Need A Unified Semantic Layer

​For years, the semantic layer was the behind-the-scenes part of the data stack. It sat beneath dashboards, making sure “revenue” meant the same thing in finance as in sales. When it was missing, a human analyst usually noticed and filled the gap. Agentic AI has removed that safety net. Standards such as the Model Context Protocol (MCP) have made it remarkably easy to connect AI agents to enterprise data systems.