[Release] google/adk-python v1.34.1: v1.34.1

Google ADK Python v1.34.1 is a bug fix release addressing three critical issues: grounding metadata being silently discarded in Gemini 3.1 live, incorrect input/output transcription finished events for Gemini v3.1, and session drops occurring when MCP tools encounter errors. These fixes improve reliability and data integrity for Gemini integrations and tool-based workflows.

Key Points

• •Fixed grounding metadata loss in Gemini 3.1 live mode that was being silently discarded without user awareness
• •Corrected input and output transcription finished event handling for Gemini v3.1 to ensure accurate event sequencing
• •Resolved MCP tool error handling to prevent unexpected session termination when tools fail
• •Update to v1.34.1 recommended for users relying on grounding, transcription events, or MCP tool integrations
• •All fixes target Gemini 3.1 compatibility and tool reliability in production environments

Workflow Diagram

Concepts