Customize how close pointer has to be for hover tooltips to display?

I’m trying to customize the hover tool so that I don’t have to point precisely at the data point for the tooltip shows up. Instead the hover tooltips would show up when I hover within some specified distance to an plot emelent.

That is, how do I allow some pointer range/fuzziness to the hover tool?

Is it all all possible with bokeh?

This is useful when the objects being plotted are visually small, and hard to point to precisely. E.g.,

from bokeh.plotting import figure, output_file, show
p = figure(plot_width=400, plot_height=400, tools='hover')
p.circle([1,2,3,4,5], [2,5,8,2,7], size=2)
show(p)

Starting with Bokeh 2.3 there is a hit_dilation property that you can set on scatter markers (e.g. circle).