What does a good brief look like for a designer using a design thinking approach?

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The design thinking double diamond starts with "Rip the brief" and then goes onto researching the customer problem followed by defining the design challenge. This implies that there is a brief but that we are questioning everything anyway.

So what does the client need to do to develop a worthwhile brief in this system?

  • What goes in a good brief for a double diamond approach?
  • How should a client go about developing a good brief?
  • What research and analysis should they do to develop their brief?
  • What should they leave for the designer to research?

https://blog.marvelapp.com/apply-design-thinking-hcd-ux-creative-process-scratch/