Google ADK Tutorial: How to Connect APIs & Build Custom Tools

LLMs are smart, but they are stuck in the past. If you ask Gemini or ChatGPT for the weather right now, they can't tell you... unless you give them Tools.

In this video, we continue our "Mastering Google ADK" series by building a Real-Time Weather Agent. You will learn how to connect your agent to external APIs using Custom Function Tools in the Google Agent Development Kit.

📂 Resources:
Source Code GitHub: https://github.com/Hariharan0309/adk-...
📄 Google ADK Documentation: https://google.github.io/adk-docs/tools/

In this video, you will learn:
1. Why LLMs fail at real-time tasks.
2. How ADK "Tools" act as a bridge to the outside world.
3. How to write a Custom Python Tool for Open-Meteo (No API Key needed!).
4. How to handle Geocoding, City Name - Coordinates.
5. Debugging with the ADK Trace View.

⏱️ Timestamps:
0:00 - The Problem: AI doesn't know the weather?
0:38 - What are ADK Tools?
1:21 - The Architecture: Input - Gemini - Tool - Response
2:04 - Code Walkthrough: Setting up the Agent
2:30 - Implementing the Retry Logic
4:06 - Writing the Weather Tool
5:05 - The Demo: Testing the Agent in ADK Web UI
5:50 - Conclusion & Next Steps

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