Designing Reliable AI Agent Workflows with Gemini API and External Tools

I am exploring different approaches for building AI-powered workflow systems where Gemini can understand user intent, reason through tasks, and interact with external tools or APIs.

A common architecture I have been experimenting with includes:

  • User request/input layer
  • Gemini reasoning layer
  • Tool/API execution layer
  • Workflow orchestration
  • Validation and human approval steps

Some questions I would like to discuss with the community:

  1. What patterns are you using for managing multi-step workflows with Gemini API?
  2. How do you handle failures when an AI agent calls external APIs?
  3. Are you using custom orchestration layers, Google Cloud services, or third-party workflow tools?
  4. What approaches have worked well for maintaining reliability in production AI agents?

Would love to hear how developers are designing scalable Gemini-powered automation systems.