Announcing the Agent2Agent Protocol (A2A)- Google Developers Blog

What this post added

Introduces the Agent2Agent (A2A) protocol, an open standard for AI agent interoperability. Details A2A's design principles (embrace agentic capabilities, build on existing standards, secure by default, support for long-running tasks, modality agnostic) and its technical workings, including capability discovery via Agent Cards, task management with lifecycle and artifacts, collaboration mechanisms, and user experience negotiation. Provides a real-world example of candidate sourcing using A2A and highlights partner contributions.