Hi @VivienD in the future please use actual code formatting so that the code is formatter as code (either with the </> icon on the editing toolbar, or triple backtick ``` fences around the code blocks)
FYI the BokehJS function API is much less mature than the Python side. AFAIK it does not yet support a tooltips convenience argument, and you would need to configure HoverTool explicitly as in this example:
bokeh/bokehjs/examples/hover at branch-2.4 · bokeh/bokeh · GitHub