MCP Dev Summit Mumbai 2026

We design MCPs assuming idempotency, apply the same action twice nothing changes, reconcile repeatedly, and state is declarative.

But in reality, most MCP actions are only partially idempotent, because beneath the abstraction external systems mutate independently, side effects escape the control plane, ordering of operations matters, and “same input” doesn’t always mean “same result”. At scale, MCPs rely on many things like reconciliation loops, declarative APIs, retry-based execution.

We’ll unpack how MCPs unintentionally, violate idempotency through hidden side effects, depend on ordering guarantees that don’t exist, produce divergent states under retries, mask unsafe operations behind “safe” abstractions. This isn’t a talk about retries or Kubernetes patterns. There are no controller frameworks, just a deeper examination of why MCPs aren’t as safe as we assume, and how to design them with fewer hidden risks.

Because the most dangerous systems aren’t the ones that fail.
They’re the ones you believe are safe to retry.