Tells adverbs are provided in this article. The words listed here are commonly found along with the verb tells in sentences. This reference page helps answer the question what are some adverbs that describe or modify the verb TELLS.
actually, basically, boldly, briefly, calmly, certainly, clearly
constantly, continually, coolly, directly, distinctly, equally, essentially
eventually, exactly, explicitly, expressly, finally, frankly, frequently
generally, gravely, heavily, immediately, kindly, merely, plainly
probably, proudly, quickly, quietly, rarely, really, repeatedly
simply, specifically, strongly, truly, usually
Hope this word list had the tells adverb you were looking for. In addition to adverbs used with tells, other example verb adverb pairings can be found on this site.
You can help by adding more adverbs in the comments. Thanks.