You know, I've seen this concern expressed more than once and I'm not sure if it's different people who feel like they can't express themselves well or the same person. Look. I make a lot of secrets. Sometimes I don't phrase them well and there are misunderstandings... but that's what the comments are for.

But chances are you're overthinking this. My advice is to keep short and sweet and reread what you've written to make sure it's as clear as it can be and that all the words and phrases mean what you want them to mean. Misunderstandings aren't the end of the world.