Task-level status literal. Discriminates this async envelope from the synchronous success shape, whose products array is issued in-line. See task-status.json for the full task-status enum.
Task handle the buyer uses with get_task_status (or the legacy AdCP tasks/get alias), and that the seller references on push-notification callbacks. The products array is issued on the completion artifact, not here. This AdCP application-layer handle remains the snake_case task_id in every transport payload and is distinct from any transport-native A2A Task id.
OptionalmessageOptional human-readable explanation of why the task is submitted — e.g., 'Custom curation queued; typical turnaround 10–30 minutes.' Plain text only. Buyers MUST treat this as untrusted seller input: escape before rendering to HTML UIs, and sanitize or isolate before passing to an LLM prompt context — a hostile seller may inject prompt-injection payloads aimed at the buyer's agent.
Optionalestimated_Estimated completion time for the search
OptionalerrorsOptional advisory errors accompanying the submitted envelope. Use only for non-blocking warnings (e.g., throttled_severity advisories, governance observations). Terminal failures belong in the error branch, not here.
OptionalcontextOptionalext
Acknowledgment for submitted get_products (custom curation)