exportconstBACKGROUND_OUTPUT_DESCRIPTION=`Get output from background task. Use full_session=true to fetch session messages with filters. System notifies on completion, so block=true rarely needed. - Timeout values are in milliseconds (ms), NOT seconds.
IMPORTANT: ONLY call this tool AFTER receiving a <system-reminder> notification for the task. Do NOT call immediately after launching a background task - wait for the notification first.`