Connect once, then keep the prompt natural.

Compatibility

Verify the current ChatGPT custom MCP support matrix at release time. VSLZ is standards-first and does not require a ChatGPT-only client API, but host support still determines whether the widget can mount.

Fallback behavior

When a host cannot render the UI resource, the MCP result still includes a concise textual summary and the validated structured specification. A compatible host can render the same resource without changing the tool contract.