funny short story with the title "caller idle"

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The phone rang at the FBI headquarters.

"Hello?"
"Hello, is this the FBI?"
"Yes, what do you want?"
"I am calling to report my neighbor Adrian Thibodeaux, he has a drug hidden in the wood!"
"Thank you very much for the information, sir."
The next day, FBI agents dropped off at Thibodeaux's house. They are looking for firewood in the warehouse. Using axes, they split each piece of wood, but found no drugs. They apologized to Thibodeaux and left.
The phone rang at Thibodeaux's house.
"Hey, Adrian! Did the FBI come?"
"Yeah!"
"Did they cut your firewood?"
"Yep"
"Good, now it's your turn to call, I need my garden to be castrated."
how?