Idempotence only concerns a single function. There are AWS functions like RunInstances (EC2) that are not principally idempotent. They could drop RunInstances r

Idempotence only concerns a single function. There are AWS functions like RunInstances (EC2) that are not principally idempotent. They could drop RunInstances requests with the same timestamp, not sure if they do that. In any case, it is worth noting that requests have a timestamp that expires after 5 minutes.