‘All’ with the meaning ‘the only thing’ is listed at B1 in the English Vocabulary Profile.
For example:
All it does is tire your mind and stops you thinking for yourself.
An iWeb search for:
All * _VM _VVI _VB
1 ALL I CAN SAY IS 19460
2 ALL WE CAN SAY IS 1135
3 ALL I COULD THINK WAS 1028
4 ALL I COULD SEE WAS 817
5 ALL YOU ‘LL NEED IS 722
6 ALL YOU WILL NEED IS 702
7 ALL I CAN SEE IS 702
8 ALL I CAN THINK IS 604
9 ALL IT WOULD TAKE IS 597
10 ALL YOU CAN SEE IS 501
11 ALL I CAN FIND IS 478
12 ALL I WILL SAY IS 460
13 ALL I CAN SUGGEST IS 410
14 ALL I COULD FIND WAS 365
15 ALL I COULD SAY WAS 335
All * _VD _VB _V
1 ALL IT DOES IS MAKE 242
2 ALL YOU DO IS ADD 224
3 ALL IT DID WAS MAKE 211
4 ALL YOU DO IS PUT 170
5 ALL IT DOES IS GIVE 126
6 ALL YOU DO IS GET 106
7 ALL YOU DO IS TAKE 90
8 ALL I DID WAS ADD 80
9 ALL I DID WAS PUT 75
10 ALL I DID WAS TAKE 63
11 ALL YOU DO IS ENTER 61
12 ALL I DID WAS ASK 60
13 ALL I DO IS PUT 52
14 ALL YOU DO IS MAKE 52
15 ALL THAT DID WAS MAKE 49
A2: add, could, enter
B1: suggest