The part of a sentence 'certainly describing' is correct and usable in written English.
You could use 'certainly describing' while emphasizing a description that is accurate or true. For example: The description given of the lake was certainly describing its beauty.
Yet she gently reproves Ellison, letting us know that he was almost certainly describing not yams, but sweet potatoes.
The 300 grams that will remain on the nutrition label as the percent daily value of carbohydrates is most certainly describing a diet that is high in carbohydrates.
It is therefore difficult to compare BFMF levels with MACS levels, as the two systems are almost certainly describing very different aspects of function, with BFMF looking more at "impairment" and MACS more at "activity".
The self-appointed pox specialist and surgeon Joseph Schmid claimed that the hunt for the pox and its physical signs in each patient's body required an extremely experienced healer (he was certainly describing himself), for the signs of the pox were innumerable and they easily "fooled" healer and patient alike.
SEDUCTIVE certainly describes the institute's "Star Wars" exhibit.
"Constant uncertainty" certainly describes the path of Qu's immortality.
That certainly describes Mr. Nagouri, Aurangabad's answer to Donald Trump.
This is the aerie of a hugely successful man, which certainly describes Mr. Stern.
This approach certainly describes Obama's foreign-policy review on Afghanistan and Pakistan, which was issued late last month.
That certainly describes Tabu, bits of Neighbouring Sounds, and the subdued fatalism they share.
Swiftness certainly describes the pace of change of Chongqing's landscape.
