Thank you for taking good photos.
In my opinion, the neighbor's roof line appears to be "self-contained" i.e. not jut out and does not present any significant issues, despite a slight downward slant. Overall, the assessment suggests that there are no concerns regarding the roof's design or potential hazards.
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The tree trunk [In red], symbolically viewed as a poison arrow directed at the window, poses a threat only as long as it is visible; once it is no longer seen, it ceases to be a danger.