A2A Protocol FAQs

Question 1

What is Google's Agent2Agent (A2A) Protocol?

Accepted Answer

A2A is an open standard, initially introduced by Google and now standardized under the Linux Foundation, designed for AI agents to communicate. It defines concepts like Agent Cards (describing capabilities), structured task lifecycles, and agent discovery.

Question 2

How does this server combine MCP and A2A?

Accepted Answer

The server uses MCP to expose A2A operations as callable tools to any MCP-compatible AI agent. This allows AI models to leverage A2A for horizontal communication (agent-to-agent) while MCP handles vertical communication (model-to-tools), creating a complete agent interaction stack.

Question 3

What is the A2A Protocol MCP Server?

Accepted Answer

The A2A Protocol MCP Server acts as a bridge, enabling AI agents to discover, delegate tasks, and communicate using Google's Agent2Agent (A2A) Protocol, all exposed through an MCP (Model Context Protocol) interface for seamless integration with AI models.

Question 4

What key capabilities do AI agents gain with this server?

Accepted Answer

AI agents can create and manage A2A-compatible Agent Cards, register themselves in a local directory for discovery, search for other agents by specific capabilities, delegate tasks following A2A formats, and monitor the status of those delegated tasks.

Question 5

Where does the A2A Protocol MCP Server store agent and task data?

Accepted Answer

Agent Cards and task history are stored locally on your system within the `~/.a2a-agents/` directory. Specifically, `agents.json` holds registered Agent Cards and `tasks.json` maintains the history and status of delegated tasks.

A2A Protocol

A2A Protocol

Key Features

Use Cases

Key Features

Use Cases