We got one for our 5th grader, but it was in a question/answer form. It asked things like:
List 5 words that describe your child.
What motivates your child?
What upsets your child?
What activities does your child participate outside of school?
What is your child's best subject?
What is your child's worst subject?
Etc...
I was happy to fill it out. I think this fomat might have been easier on parents than the vague wording of the OPs assignment. Either way I think it is a good idea.
I think either wording should be fine, but I think either way, someone is going to have a problem with it, and that's the real problem. In the question/answer format you give above, someone is going to be mad that the teacher asked about participation in activities outside of school because that's none of the teacher's business! And someone is going to be upset that the teacher asked about the worst subject because they want to stay positive! So, maybe this teacher thought it would be less threatening to ask for the parents to send in whatever they want to say about their kids. But, as you've seen here, then some will be upset that that's too broad. You can't please everyone.