I have a dataframe

  descriptions names cutoffs vals
1            a     A      90    1
2            a     A      91    2
3            a     B      90    3
4            a     C      90    4

that I want to pivot_wider(names_from = names, values_from = vals) into the form

  description A B C
1           a 1 3 4

If there are 2+ rows with the same name, I want to fill in values_from with the row with the higher cutoff column value.

I know that if I wanted the max value out of the vals column, I could do values_fn = max, so
I tried adding values_fn = max(cutoffs) as an additional parameter to pivot_wider() but it did not work.

How can I get to my desired end result?