Question 1

How do I resolve a 400 Bad Request error on Gemini?

Accepted Answer

Make sure your request does not configure responseMimeType: 'application/json' alongside active tool use filters like Google Search, as these parameters conflict in Google's API config.

Question 2

How does prompt grounding work?

Accepted Answer

Grounding uses active web search results (via Serper or Google Search) and feeds the result snippets into the LLM context to guarantee fact-based citations.

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