Here’s the uncomfortable truth most marketing teams discover three months after adopting AI: their brand voice has homogenised.
Every email sounds like every other email. Every caption feels like a Linkedin thought-leadership post run through a filter. The stuff that made the brand you — the specific phrases, the rhythm, the hot takes — disappeared.
The cause isn’t AI. It’s that you never documented your voice rigorously enough for AI to preserve it.
What most brand guidelines actually contain
Hex codes and fonts
A values statement (“We believe in authenticity”)
One sentence about tone (“conversational yet authoritative”)
A list of don’ts that’s too vague to action
None of this tells an AI model how you sound. “Conversational yet authoritative” can produce 10,000 different outputs. Your brand voice is zero of them.
What an AI-ready voice doc looks like
10 “signature phrases” you actually use. Not slogans. Actual turns of phrase. (“Here’s the uncomfortable truth…”/“Let’s strip that back.”/“That’s not X. It’s Y.”)
10 “banned phrases.” Things your brand doesn’t say, ever. (For Chazrt: “unlock,” “in today’s fast-paced world,” “revolutionise,” “synergy.”)
Sentence length distribution. “60% of sentences should be under 15 words. 30% between 15-25. 10% longer for rhythm breaks.”
Opening pattern examples. How 5 recent posts opened. Models will pattern-match.
Closing pattern examples. Same. The ending is often where voice dies first.
Three “anti-examples”— blog posts from OTHER brands in your space that you would never write. Tell the AI what not to sound like, not just what to sound like.
One reference author. “Write like [specific writer], not [generic Linked In ghostwriter voice].”
This takes 2-3 hours to write once. It saves you months of corrective work later.
The test: paste your current brand guideline into Claude or ChatGPT along with a blog topic. Ask for a 300-word post. Is it recognisably yours? If the answer is “this could be any SaaS blog post”— your voice doc isn’t doing its job.
Most SMB marketing teams in Singapore skip this step. Then wonder why AI makes their content sound like everyone else’s.
If you want help writing the voice doc properly, book a free discovery call at chazrt.com.