I changed the description from descending to reverse alphabetical as you have suggested. Thanks for the feedback.

I think reverse alphabetical (Z->A) would be more clear than "descending". Descending typically refers to numbers, from largest to smallest.

I was confused when doing the kata, as well, and had to rely on the test cases...

Hello thanks for the message. The instructions and examples on the Kata description are correct sort in descending order.I believe you may be referring to the unsorted string.

Could you clarify what the sort order is supposed to be if the names have the same length? From the example it seems like they should be in reverse order than how they appear in the original string, but this isn't the case in the random test cases.