I think when we meet the character, it should say a lot about the character we're meeting.
Sample:
INT. ADDIE’S THRIFT STORE
MISS HOKE, a spiteful widow in her seventies, leans impatiently on a walker by the counter. She wields a broken umbrella like an extension of her gnarled hand.
MISS HOKE
Arthritis. Contractures. Diabetes. Gout. Angina.
MISS HOKE
And I’ve got cataracts in both eyes.
NATALIE
Sorry I kept you waiting, Ma’am.
MISS HOKE
Do you run this store or don’t you?
NATALIE
You need three scratch-offs?
MISS HOKE
Don’t tell me what I need, little girl.
Don’t tell me what I need, little girl.
End sample.
I describe Miss Hoke as spiteful in the scene description, but obviously an audience won't be privy to that. And since, Miss Hoke was a secondary character, it had to come across in the dialogue right out of the gate. We aren't going to spend a lot of time with her, so how she introduced herself was important. She is a catalyst for the story, but that doesn't mean she has to read like it, or be nothing more than a tool.