Tool Use: Connecting To Real APIs

Tools: Giving Agents Hands

Without tools:
Agent: "I think you should check your calendar and search for restaurants nearby."
You have to do it manually ❌

With tools:
Agent: Calls check_calendar() "You're free at 7pm."
Calls search_restaurants({location: 'nearby', time: '7pm'}) "Found 5 options. Shall I book the Italian place?" ✓

Tools transform agents from advisors to workers. They're the bridge between AI reasoning and the real world.