UTCP, MCP, and the Missing Identity Layer
Tool calling is easy. Trust isn’t. Every new wave of infrastructure brings its own version of the “simpler protocol.” With AI agents, that moment arrived fast — the Universal Tool Calling Protocol (UTCP) has started making noise as the next big thing. Its promise sounds familiar: no wrapper servers, no middleware, no proxy hops. Agents can “just call” APIs, CLIs, or services directly using a JSON manual. Elegant. Minimal. Free of the heavy machinery that came with the Model Context Protocol (MCP). ...