AI 服务暂时不可用，以下为来源正文，待恢复后补全翻译。
TL;DR — Key Takeaways Google’s A2A protocol is moving under the Agentic AI Foundation as momentum builds around standards for agent-to-agent interoperability. A2A lets AI agents discover capabilities, delegate tasks and communicate across different frameworks and vendors without bespoke integrations. A2A 1.0 adds features including multitenancy, protocol negotiation and signed agent cards designed to strengthen enterprise deployment and identity verification.