Consistency is easier when brand decisions are recorded once instead of recreated for every post. A practical Brand Kit should define approved colors, typography, logo use, voice, audience, and a short list of phrases to use or avoid.
Use those rules as the starting context for Social Studio drafts. Keep enough layout variation for different messages, but check every item against the same brand constraints before approval. When a rule changes, update the Brand Kit first so future content starts from the current version.