If you want to use it in a text post, per say, or as a reaction gif, then by all means go ahead. No tagging or credit needed for that. :3 If you really want to, maybe use #becausehiddlesgif as a tag? But I really don’t ask that you do that. Honest.
I have a problem with people who save my gifs and edits to their computers and completely repost them as new photo posts, which put them in the Tom tag or the Loki tag, and my original posts don’t get the credit for it.