uninformative 

A word that does not inform.

Think Using Parataxis Sentences. They give each idea equal importance and are the most concise because they contain only independent phrases and omit conjunctions and other uninformative, useless, unessential, unneeded, obvious, or repeated words. Wordy speech and writing contain uninformative, obvious, unneeded, useless words, typically repeat things, and always drain time and effort.

uninformative by simplify messages March 20, 2023

Uniformative 

To be uniform; remaining the same in all cases and at all times; unchanging in form or character.

The results Sean observed indicated a uniformative pattern

Uniformative by Mr. Dalgleish August 23, 2022

Unformative 

Producing or accomplishing nothing.

After going to Best Buy for tech support, being told wrong information and then figuring out the problem myself, I thanked them and told them their advice was very "unformative."

Unformative by pflents June 27, 2009