How to place all graph's vertexes names in Tooltip?

Question

I want to render a graph displaying nodes labels only inside Tooltip, not rendered on the graph.

How can I map Tooltip to all vertexes in VertexLabels -> "Name" ?

I saw: Graph, ToolTip, and Labeled: How to make a swanky graph and https://mathematica.stackexchange.com/a/17126/44334

I see a syntax like:

TreeGraph[{1, 2, 3}, {1 -> 2, 1 -> 3}, 
VertexLabels -> {"Name", 3 -> Tooltip["3", "Equation 1"]}, ImagePadding -> 20]

where Tooltip is applied to a specific node, instead I want only a Tooltip for all nodes.

In my example vertex labels would be "1", "2" and "3".

I tried with:

VertexLabels -> Tooltip["Name"]

Tooltip /@ VertexLabels -> "Name"

VertexLabels -> {Tooltip["Name"]}

Answer 1

You almost got it :-) It's

VertexLabels -> Placed["Name", Tooltip]

This usage is shown in VertexLabels -> Scope -> Label Specification.