An MCP server exposes tools that a model can call during a conversation and returns results according to the tool contracts. Those results can include extra met

An MCP server exposes tools that a model can call during a conversation and returns results according to the tool contracts. Those results can include extra metadata—such as inline HTML—that the Apps SDK uses to render rich UI components (widgets) alongside assistant messages. More: https://github.com/openai/openai-apps-sdk-examples?tab=readme-ov-file#mcp--apps-sdk-overview https://github.com/openai/openai-apps-sdk-examples?tab=readm...