This popped nto my head this morning and I believe it is original; at any rate it is not in The Canonical List of Top Swifties, which only lists

80. "Please, Christopher," said Tom crisply.

81. "Let's go get some lettuce," said Tom crisply.

Interestingly, when I went to look at a sample Tom Swift adventure, I discovered the eponymous Tom gives a "crisp" answer near the start of Tom Swift and his House on Wheels, from 1925, which you can find at Project Gutenberg.

Tom Swift, with a negative shake of his head, shoved several papers across the table that separated him from a burly, red-faced man whose eyes narrowly observed the young inventor.

"Then you refuse this contract, Mr. Swift—a contract for constructing over one hundred thousand dollars' worth of machinery on which you can make a handsome profit? You absolutely refuse it?"

The red-faced man in his eagerness was leaning forward now.

"Yes, Mr. Cunningham, I refuse!" was Tom's crisp answer. "The Swift Construction Company does not care to handle it."

Here is the front cover. I think I might try and get an original copy secondhand, if it's not too pricey. Definitely a collector's item.