Notification that the sandbox proxy iframe is ready to receive content.
This is an internal message used by web-based hosts implementing the
double-iframe sandbox architecture. The sandbox proxy sends this to the host
after it loads and is ready to receive HTML content via
McpUiSandboxResourceReadyNotification.
Notification that the sandbox proxy iframe is ready to receive content.
This is an internal message used by web-based hosts implementing the double-iframe sandbox architecture. The sandbox proxy sends this to the host after it loads and is ready to receive HTML content via McpUiSandboxResourceReadyNotification.
See
https://github.com/modelcontextprotocol/ext-apps/blob/main/specification/draft/apps.mdx#sandbox-proxy