re-tag them into your computer, and re-upload them. There is no way to tell on esty if they are tagged or not and I am not a mind reader....
I take around 200 photos at a time myself, when I compress them for uploading, I also re-name them all, like, I save 5 different photos for esty of a Jack Russell wearing a santa hat, click on them all, re name them, jack russellornament27.jpg, 28.... This only works for google if you are also putting them online elsewhere, like your blog, your own website, twitter, photobucket, flickr,
if not then do not bother as etsy renames all of your photos anyway!