It doesn’t matter what methodology you are using.
Your requirements are a story.
They are a story that people want to read like a book.
They want to read it so badly that they can never put it down.
They want to be consumed by it.
They want to never stop reading it.
They want it to be the bestseller they never knew about.
They want to be blown away by it.
And they want to be so inspired by it that they go and build the best software you have ever seen.
That is what your requirements need to be.