Why I built this.
I read a lot of creative briefs. Some of them are excellent. Most of them are vague in ways that the author cannot see, because the vagueness has been normalized inside whatever team wrote them. I wanted a tool that would surface the vagueness specifically, rather than offer a generic improvement suggestion, and would do so in a way the author could act on the same afternoon.
The rubric.
The tool scores a brief on six axes. Objective: does the brief state what success looks like? Audience: is the audience named specifically enough to design for? Specificity: are the requirements concrete, or are they adjectives? Constraint: are the non-negotiable limits (budget, timeline, regulatory) named? Deliverable: is the output format specified? Tone: has the brief given the writer any direction on voice, register, or brand personality?
Each axis gets a score out of five and a short written critique. The critique is what makes the tool useful. The scores alone are too reductive to act on.
What it catches well.
It is particularly good at catching briefs that have confused the subject with the audience ("this is for young people who like technology" is a tautology, not an audience). It catches adjective-stacked briefs that sound specific but are not ("edgy, premium, authentic" names nothing). It catches briefs that have declared an objective but no measurable version of success.
What it doesn't catch.
It cannot tell whether the brief is strategically right. A brief can score high on all six axes and still be pointed at the wrong market. That is a human problem. The tool is for the craft layer, not the strategy layer.
How to use it.
Best practice: paste the brief, read the critique, rewrite the brief, paste the rewrite. Do this three times. Most briefs I have seen improve measurably by the third round. By the fourth round you are polishing, and it is time to stop.
Build notes.
Full build notes, the rubric in machine-readable form, and a short video walkthrough are linked above. The prompt chain is MIT-licensed. Steal it, fork it, rewrite the rubric to match your own discipline. It works for editorial briefs, design briefs, photography briefs, and with small edits, for engineering briefs.