This is a transport-level compatibility control, not a complete stateless-agent architecture. The documented example establishes a bounded configuration, not a general claim that an agent deployment has become stateless.
Removing MCP transport sessions avoids requiring follow-up requests to return to the same replica for transport-session continuity, but does not remove application persistence or coordination requirements. The behavior is version-sensitive: legacy clients using MCP 2025-11-25 or earlier can use the flag to avoid transport sessions, while requests on MCP 2026-07-28 are sessionless regardless of it. Legacy stateless mode loses server-to-client requests and SSE resumability, though request-scoped progress still works. The example makes the protocol-version boundary and the operational consequence explicit for teams deploying MCP behind multiple replicas.
Teams should treat transport statelessness and application-state sharing as separate deployment decisions. Agno conversation history and run state remain independent of transport state; the documentation says replicas still need shared application storage and run coordination. This is documentation and sample code, not a measured deployment report; it does not demonstrate production scale or quantify reliability gains. Watch whether Agno documents or demonstrates a multi-replica setup with shared persistence and run coordination. The supplied source is an implementation example, so its evidence supports the configuration and stated limits, not production outcomes.