Reading the SNS.yaml example and I’m noticing that the SNS title and Token name have similar minimal length, 4 bytes, but different maximal length, 256 vs 255 bytes.
So just though about asking in case that would by a typo?
NnsProposal:
# The title of the NNS proposal. Must be a string of 4 to 256 bytes.
title: ~
Token:
# The name of the token issued by the SNS ledger.
# Must be a string of 4 to 255 bytes without leading or trailing spaces.
name: ~