Bernd 02/12/2018 (Mon) 16:37:10 No.13639 del
All right a more serious answer:
Every szerszám is eszköz, but not every eszköz is ''szerszám'. So for an extent these are compatible expressions. But there's a line where the equivalence ceases and you can find this line in what I wrote previously.

Not really. Animals widely use eszközök but never szerszámok and animals use tools.
Maybe apes sometimes use szerszámok there could be an example I don't know about, maybe I should look into it.