Keep the observer’s description intact.
The person on site may report water over an edge, a drip beside a pipe or visible plant growth. Ask for the location and timing, not a diagnosis. Leaves and twigs can gather in channels; fallen moss fragments can be debris without making clearance a roof moss-removal service.
Previous work information can help, but an unknown date should remain unknown. A loose gutter or damaged connection may require separate assessment. Do not ask someone to probe it or reach from a window to confirm what is wrong.