it still didn't click me. Let's say I have 2 agents which uses 2 APIs under the hood: - Agent A: uses API A1 and A2 through MCP - Agent B: uses API B1 and

it still didn't click me. Let's say I have 2 agents which uses 2 APIs under the hood: - Agent A: uses API A1 and A2 through MCP - Agent B: uses API B1 and B2 through MCP Assumption here is that, Agent A can't access APIs B1 and B2 but can access Agent B. What if I expose Agent B as an MCP server. Why do I need A2A?