Partial and complete input notifications replace the same toolInput
snapshot while pending. Because the MCP Apps notification has no tool name
or request id, the first structured result, tool error, or cancellation is
assumed to belong to the rendering invocation and becomes terminal.
Content-only successes are valid ambient activity and are ignored.
The rendering invocation's latched lifecycle.
Partial and complete input notifications replace the same
toolInputsnapshot while pending. Because the MCP Apps notification has no tool name or request id, the first structured result, tool error, or cancellation is assumed to belong to the rendering invocation and becomes terminal. Content-only successes are valid ambient activity and are ignored.