Look for changes, without inspecting at gutter level.
Suitable observations include material above the edge, water escaping during ordinary rain and debris near a visible outlet. If the same section has become more difficult to see because of vegetation, mention that too. None of these requires a ladder, leaning out of an upper window or touching the gutter yourself.
A gutter may contain leaves without yet showing obvious overflow. It can also look empty from below while material has collected nearer the outlet. The purpose of inspection and clearance is to address the actual condition, rather than assume that every channel needs identical treatment on the same date.