Not enough substance.
THE CAUSE
Usually not enough in the prompt.
A one-line request produces a shallow answer.
THE FIX
Supply more: context, what you want covered, what the reader needs.
"Cover [these points] in detail" works better than asking for more words.
WHAT NOT TO DO
Ask for a word count and expect depth.
Padding to a length produces filler, not substance.
FOR MORE DEPTH ON A SPECIFIC POINT
"Expand the section on [what]. Add detail and an example."
Section by section produces better depth than asking for a longer whole.
IF IT GENUINELY LACKS THE MATERIAL
It may not know enough about your subject.
Supply the material and ask it to organise it.
THE HONEST CASE
Some subjects do not need length.
A thin answer to a simple question is correct.
