A2A Protocol – Agent to Agent Communication Framework by Google

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A2A facilitates communication between a “client” agent and a “remote” agent, providing a standardized way of interaction.
1
Capability Discovery
Agents can advertise their capabilities using an “Agent Card” in JSON format, allowing the client agent to identify the best agent for a task.
2
Task Management
Communication between client and remote agent is task-oriented. The “Task” object is defined by the protocol and has a lifecycle.
3
Collaboration
Agents can send messages to each other to convey context, responses, artifacts, or user instructions.
4
UX Negotiation
Each message includes “parts”, allowing the client and remote agent to negotiate the proper format and user interface capabilities.

From: A2A Protocol – Agent to Agent Communication Framework by Google.

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