The answer to your question is Errand
Answer: using slang or otherwise informal language isn't trustworthy. It shows that the writer is taking the subject seriously and putting effort into their work.
Explanation:
Well your asking "Can a question be a annotation" And the definition if annotation is "a note of explanation or comment added to a text or diagram." Now looking at that we see "explanation or comment" So in a way...It's more of a answer not a question...
It seems as though the Author's purpose is to appeal to a reader's sense of positivity.