Microsoft Azure App Service guidance on MCP 2026-07-28 stateless core. Confirms removal of initialize handshake and Mcp-Session-Id; requests carry MCP-Protocol-Version, Mcp-Method, Mcp-Name headers; body _meta carries client info. Practical ops: disable client affinity requirements at protocol layer, move session-keyed state to Redis/Cosmos via explicit handles, honor ttlMs/cacheScope on list results. Positions commodity HTTP load balancing as now protocol-native for MCP servers on App Service.