Tool result formatting — CCA-F Exam Prep

L2.10✨ 0

REAL STORY A customer service chat. Customer: 'Where is my latest order?' Claude: 'Your tracking number is 1Z999AA10123456784 and it's currently in transit.' The customer's actual latest order has a completely different tracking number. On the side, a massive JSON blob with hundreds of orders is visible. Claude picked the wrong one. Red circle highlighting the mismatch.

A customer service chat. Customer: 'Where is my latest order?' Claude: 'Your tracking number is 1Z999AA10123456784 and it's currently in transit.' The customer's actual latest order has a completely different tracking number. On the side, a massive JSON blob with hundreds of orders is visible. Claude picked the wrong one. Red circle highlighting the mismatch.

Claude gave the customer a tracking number. Confidently. It was from the wrong order.

The customer asked: "Where is my latest order?" The agent called get_order_history. The tool returned everything -- 247 orders spanning 3 years, each with 15+ fields. 50KB of nested JSON.

Claude needed one thing: the tracking number for the most recent order. But the orders weren't sorted. The dates were in different formats. Claude picked a tracking number from order #47.