Merlin is interesting when the same reference docs keep showing up. The compare page calls out Merlin Projects for reusing the same sources, and says the useful reply is usually smaller than the available context.
That's the trap. You attach three PDFs, then the comment needs one short question. Try one reply with references and one without. Keep the shorter one if it still sounds like you.
Also read the extension-specific policy before installing it for work. Plan limits and data handling differ by product, not by the word "AI" on the store page.
Our writeup: when a reply needs a knowledge base.