A content manager at a mid-size e-commerce brand once described their AI social content as 'technically correct and completely wrong.' The posts were grammatically fine, hit the right topics, and still felt like they'd been written by someone who'd never met the brand. The brief had three words: 'summer sale announcement.' That's not a brief. Here's what one actually looks like.
The five elements every AI social brief needs
Treat each social post like a small project. The brief should specify:
- Platform and format: LinkedIn vs. Instagram vs. X. Each has different norms. A LinkedIn post that performs well would read as corporate on Instagram. Specify word count targets, 150 words for LinkedIn, under 80 for X.
- Primary message: One sentence. What is this post trying to make the reader think, feel, or do? Not 'promote our new feature', 'make marketers realise they're wasting four hours a week on tasks AI can handle'.
- Audience context: Who's seeing this post and what do they already know? A brand manager at a 200-person FMCG company has different reference points than a freelance designer.
- Tone parameters: Direct or conversational? Use data or lead with a scenario? List three brand voice rules explicitly, e.g., 'no corporate jargon', 'short punchy sentences', 'second person only'.
- Avoid list: Words, phrases, or claims the post must not include. This is often more useful than the positive instructions.
Why 'on brand' fails without written parameters
When you ask an AI to write 'on brand', it pulls from its training data, which is the average of the internet. If your brand has a distinctive voice, that average will dilute it every time. The fix is to make 'on brand' mean something specific in the brief.
Notion, for example, has a very particular writing style: calm, structured, slightly philosophical. If you wanted to generate Notion-style content, you'd need to specify that, not just say 'professional and friendly'. The more precisely you describe the voice, the less correction work you do afterward.
Build a short tone-of-voice block you can paste into any brief. Keep it to five bullet points. Test it against three posts you've written manually, if it would have produced those posts, it's accurate enough.
Structuring briefs for image and copy together
Social posts usually need both copy and a visual. Brief them together. If you separate them, you get a post where the text says one thing and the image implies something else. Specify:
- The mood or visual direction (e.g., 'clean product shot, white background, text overlay')
- Any text that must appear in the image vs. the caption
- Brand colour constraints (hex codes, not just colour names)
- Whether the visual is the lead or supporting element
When your brand parameters are stored in a workflow template, this information pre-fills automatically. You only write the campaign-specific part of the brief, maybe two or three sentences.
Testing your brief quality
Run the same brief through your AI workflow twice, making no changes. If the two outputs are wildly different, your brief is underspecified, there's too much interpretive room. If they're nearly identical and both miss the mark, the brief is too narrow or the parameters are wrong.
The sweet spot is two outputs that are clearly related, both plausibly on-brand, with one that's slightly stronger. That tells you the brief is working and the review step is earning its place.
Start by improving one element of your standard brief template each week. Tighten the primary message instruction first, it's the highest-leverage change. After four weeks, run a quick review of your published posts. If your team is spending less time revising and more time approving, the briefs are doing their job.
Further reading
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