Switch the "Agentic tool call" log from {:?} (Debug) to {} (Display) on
serde_json::Value. Display produces compact JSON — `{"date":"2023-08-15"}`
instead of `Object {"date": String("2023-08-15")}` — which is what the
model actually sent and what a human reading the log wants to see.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>