Originally Posted by b12e

There's "safe" origins (US, Canada, others) and "unsafe" origins (South Africa, Caribbean, Latam, ..).

For the former, only passport control is needed. For the latter, you'd also go through security.

There's a list somewhere with countries having "sufficient" security in place so no re-clearance has to happen - it's also not a list AMS decides on themselves, just can't find it right now.