If the prompt was blocked, this will be populated with blockReason and the relevant safetyRatings.
blockReason
safetyRatings
Optional
A human-readable description of the blockReason.
This property is only supported in the Agent Platform Gemini API (AgentPlatformBackend).
If the prompt was blocked, this will be populated with
blockReasonand the relevantsafetyRatings.