Which version of Lightroom? I do not know any version that adds keywords automatically, but in Lightroom Classic you can apply a metadata or an import preset on import, and those presets can contain keywords that then also would be applied automatically.
Latest LR Classic on my iMac. I understand your comment about presets. Your comment just lead me to the answer. I am receiving photos for a book. If the photos have been processed in LR with keywords and presets by the other party, their keywords and data are added to my list when I import the photos. Thank you.