Everyone who has written something for customers has run into the same wall. You write an explanation of your service, or a letter about a price change, or instructions for something, and you read it back, and it seems perfectly clear. It seems clear because you already know what you meant, and there is no way to unknow it. This is not a failure of care or skill; it is a structural problem with being the author. The specific sentence that will confuse a reader is, for you, the sentence that states the obvious, and your eye passes straight over it.
The usual remedy is to ask somebody else to read it, and the usual problem with that remedy is that the people available are colleagues, family or friends who already know the business, and therefore share exactly the knowledge that causes the blindness. They read it, it makes sense to them, and they say it is fine - and it is fine, for people who already know. The reader you need is one who knows nothing, will read it once, at speed, with mild interest, and will not ask for clarification. That reader is hard to arrange and is the only one whose opinion actually matters.
This is a good use for an AI tool, but the instruction matters more than people expect. Asking it to improve your writing produces smoother prose that may well lose the specifics, which is usually a bad trade. The more useful request is diagnostic: ask what this says, what a reader would think they are being asked to do, which sentences could be read two ways, what question a reader would still have after finishing it, and what they would assume that you have not actually said. Those answers are information about your text rather than a replacement for it, and they are frequently uncomfortable in a useful way - the price ambiguity you did not see, the step you left out because it is obvious to you.
The edit that follows should be yours. A tool asked to fix the problems it found will tend to produce something tidier and more general, and generality is what you were trying to avoid: the particular details are why the document exists. Used diagnostically, though, this is close to the value of a fresh reader, available in a minute, at any hour, on a Tuesday evening when the letter has to go out. It cannot tell you whether what you are saying is right. It can tell you, reliably, whether you have actually said it.