Most creator briefs are written for a feed. Hook in the first two seconds, keep it moving, drive to a link. That is the right brief when the goal is reach. It is close to the wrong one when the goal is being quoted six months later in an answer to a buying question.
Write for the question, not the scroll
Assistants assemble answers to specific questions. Content that gets pulled into those answers tends to state something concrete and attributable: a comparison, a number, a clear recommendation with the reasoning attached.
A post that says which tool the author picked and why is far more quotable than one that says the space is exciting.
Durability beats timing
A feed post has a half-life measured in hours. A thread that answers a recurring question keeps getting surfaced. When you are briefing for citations, the publish date matters much less than whether the piece still answers the question a year from now.