The tool use loop — CCA-F Exam Prep

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L1.25|The tool use loop
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Real story
A personal assistant at a desk with four screens. Screen 1: a calendar app. Screen 2: a flight search engine. Screen 3: a corporate travel policy document. Screen 4: a booking confirmation page. The assistant is working through them methodically, left to right. Modern office, clean and focused.

"Book me a flight to Tokyo next Tuesday."

A personal assistant gets this request. They don't panic. They don't ask 20 follow-up questions. They just start working.

Check your calendar -- Tuesday is free. Search flights -- 14 options. Check the travel policy -- economy only, max $2,000. Filter results -- 3 compliant options. Book the cheapest -- $1,340, confirmed.

Four tools. One task. Done without bothering you once.

That's the agentic tool use loop. Claude works the same way.