Change "Hover" tooltip label in toolbar

When I make a plot with a hover tool for several layers, I would like to change the tooltip in the toolbar from the default “Hover” to a custom label when I hover over the hovertool itself in the toolbar. Is that possible?

Example plot:

I believe if you create a bokeh HoverTool instance that will support a custom description: HoverTool(description='ABC', tooltip=[...]), e.g.:

hover = HoverTool(description='Custom Tooltip', tooltips=[('x', '@x'), ('y', '@y')])
hv.Points([(0, 0), (1, 1)]).opts(tools=[hover], size=10)

Thanks @philippjfr, this sounds good. I however get an error that description is an unexpected attribute in HoverTools. Could it be a version issue? Here is my attempt:

import holoviews as hv
from bokeh.models import HoverTool

hover = HoverTool(description='Custom Tooltip', tooltips=[('x', '@x'), ('y', '@y')])
hv.Points([(0, 0), (1, 1)]).opts(tools=[hover], size=10)

AttributeError                            Traceback (most recent call last)
<ipython-input-2-afc1058f0e25> in <module>
----> 1 hover = HoverTool(description='Custom Tooltip', tooltips=[('x', '@x'), ('y', '@y')])
      2 hv.Points([(0, 0), (1, 1)]).opts(tools=[hover], size=10)

/home/conda/store/205cb5b9b1c0c2c2d9f3a4e3a712117290aeaaebd2fc5b42b587de7d9552b398-pangeo/lib/python3.8/site-packages/bokeh/ in __init__(self, **kwargs)
    233         kwargs.pop("id", None)
--> 235         super().__init__(**kwargs)
    236         default_theme.apply_to_model(self)

/home/conda/store/205cb5b9b1c0c2c2d9f3a4e3a712117290aeaaebd2fc5b42b587de7d9552b398-pangeo/lib/python3.8/site-packages/bokeh/core/ in __init__(self, **properties)
    248         for name, value in properties.items():
--> 249             setattr(self, name, value)
    251         self._initialized = True

/home/conda/store/205cb5b9b1c0c2c2d9f3a4e3a712117290aeaaebd2fc5b42b587de7d9552b398-pangeo/lib/python3.8/site-packages/bokeh/core/ in __setattr__(self, name, value)
    283                 matches, text = props, "possible"
--> 285             raise AttributeError("unexpected attribute '%s' to %s, %s attributes are %s" %
    286                 (name, self.__class__.__name__, text, nice_join(matches)))

AttributeError: unexpected attribute 'description' to HoverTool, possible attributes are anchor, attachment, callback, formatters, js_event_callbacks, js_property_callbacks, line_policy, mode, muted_policy, name, names, point_policy, renderers, show_arrow, subscribed_events, tags, toggleable or tooltips

bokeh version:
bokeh 2.2.3 py38h578d9bd_0 conda-forge

holoviews version:
holoviews 1.14.1 pyhd3deb0d_0 conda-forge

Sorry about that. Seems like that was only merged into Bokeh as part of the 2.3 branch which isn’t due to be released until some time this week. Will ping you when that and a compatible HoloViews and panel release are available.

Terrific! Thanks @philippjfr.