Gemini API Returns 400 When You Set tools and responseSchema Together — Three Designs That Make Function Calling and Structured Output Coexist
You want function calling to fetch external data and a strict JSON shape for the final answer. Setting tools and responseSchema together returns 400. Here's why, plus three production-tested designs that make both work.
Gemini API DEADLINE_EXCEEDED Errors: Five Things to Check First
When DEADLINE_EXCEEDED suddenly starts spiking on your Gemini API backend, here are the five checks I run first — based on real production debugging.
Google Workspace Gemini Features Suddenly Stopped Working: Admin and User Troubleshooting Guide
When Gemini for Google Workspace unexpectedly disappears or stops working, knowing where to look matters. This guide walks through 7 common causes—from license expiration to browser cache—split by admin-side and user-side fixes.
Fixing Gemini API Rate Limit Errors: A Complete Troubleshooting Guide
How to handle Gemini API 429 Too Many Requests and RESOURCE_EXHAUSTED errors. Covers exponential backoff, batch processing strategies, and practical patterns for staying within rate limits.
Gemini 2.5 Pro in Production: The Pitfalls Nobody Talks About
A practical guide to the production-specific problems with Gemini 2.5 Pro—rate limit architecture, Thinking mode cost control, long-context quality management, and response quality diagnostics—with complete code examples.
Gemini 3 Deep Think Not Working as Expected: 5 Common Issues and Fixes
Troubleshoot Gemini 3 Deep Think mode issues systematically. From API misconfiguration and timeouts to unexpected costs and missing thought summaries — 5 real-world problems with working code fixes.
When Gemini API Output Seems Wrong: 7 Common Causes and a Diagnostic Checklist
When Gemini API returns unexpected output — empty responses, wrong language, broken JSON, or Thinking content leaking into answers — here are 7 common causes with a practical diagnostic checklist and code examples.
Gemini Side Panel Missing in Gmail, Docs, and Sheets: A Fix Checklist
When the Gemini side panel disappears from Gmail, Docs, or Sheets, the cause usually falls into one of four buckets. Here is a seven-step checklist that will surface the real culprit on most accounts.
"Gemini Feels Worse Than Before" — How to Actually Diagnose the Problem
If Gemini's responses seem to have declined in quality, the cause is usually fixable — and often isn't Gemini's fault. A practical, experience-based guide to diagnosing and resolving perceived quality drops.
Gemini API FAILED_PRECONDITION Error: Case-by-Case Diagnosis and Fixes
FAILED_PRECONDITION in Gemini API means 'the current system state doesn't allow this operation.' Learn to diagnose and fix all common causes: billing setup, API enablement, context cache expiry, and model access restrictions.
Why Is My Gemini API Response Slow? A Practical Diagnosis Guide
Slow Gemini API responses and timeout errors can stem from 4 different causes. This guide walks you through diagnosing each one and applying targeted fixes that actually work.
Common Gemini API Long Context Problems and How to Fix Them
Struggling with Gemini API's 1 million token context window? This guide covers the most common issues — ignored middle content, slow responses, unexpected costs, and unstable output — with practical code fixes.