Nano Banana 2 Lite, Revisited: MCP 2.0, the New Interactions API, and Three Agent CLIs

7.9 relevance

MCP 2.0 and Interactions API update directly relevant to agent orchestration and developer tools.

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Why It Matters

For agent-orchestration engineers, this shows how breaking API schema changes in low-latency multimodal models ripple through MCP toolchains, requiring careful pinning of SDK versions and robust error handling in agent tool responses.

Key Takeaways

Pin google-genai >=2.0.0 and MCP SDK >=2.x when using the Interactions API, and wrap tool calls to catch schema-level errors that agents might otherwise swallow.

Nano Banana 2 Lite, Revisited: MCP 2.0, the New Interactions API, and Three Agent CLIs

Summary

Google's Interactions API dropped legacy schema support, breaking the python MCP server driving Nano Banana 2 Lite (Gemini 3.1 Flash-Lite Image). The fix required upgrading google-genai to >=2.0.0, where the SDK exposes `interaction.output_image` with `data` and `mime_type` properties. The same server was validated against Claude Code, Codex, and Antigravity CLI using MCP SDK 2.x.

Author

xbill