The Seven Deadly Sins of MCP: Operational Sins

This part of the series focuses on the operational sins: Sloth and Wrath . They belong in this category because they determine how a live MCP system behaves under stress: whether it fails truthfully, whether it recovers sanely, and whether operators can trust what they are seeing in the middle of an outage. Sloth and wrath are operational sins because they both appear when systems are stressed. Sloth hides the problem behind vague errors, weak validation, or sloppy transport handling. Wrath takes a problem that might have been survivable and amplifies it through blind retries, reconnect storms, and forceful reactions to uncertainty. Once access boundaries are tighter, the next question is how the system behaves when things go wrong. That is where these two sins take over. That operational layer is especially visible in MCP because transport and protocol behavior are part of the product. Stdio hygiene, reconnect behavior, resumability, notifications, and session handling are not side de