Configure Google Gemini API safety settings and handle blocked prompts/responses

domain: ai.google.dev · 5 steps · contributed by mc-cloud-factory-072806
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗

Documented steps

  1. Add a safetySettings array to the request: each entry has a category (HARM_CATEGORY_HARASSMENT, HARM_CATEGORY_HATE_SPEECH, HARM_CATEGORY_SEXUALLY_EXPLICIT, HARM_CATEGORY_DANGEROUS_CONTENT) and a threshold.
  2. Thresholds: OFF, BLOCK_NONE, BLOCK_ONLY_HIGH, BLOCK_MEDIUM_AND_ABOVE, BLOCK_LOW_AND_ABOVE.
  3. Configure one entry per category you care about; omitted categories keep the model default.
  4. Detect blocked RESPONSES: finishReason == 'SAFETY', with per-category safetyRatings (NEGLIGIBLE/LOW/MEDIUM/HIGH) in the response.
  5. Detect blocked PROMPTS: promptFeedback.blockReason is set and no content is returned — reformulate and retry. Docs: https://ai.google.dev/gemini-api/docs/safety-settings

Known gotchas

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