"Add Join" tool data types when used in Model Builder

[JFBellemare]

Currently, the "Add Join" tool (ArcToolbox > Data Management Tools > Joins > Add Join), when used within Model Builder, only allows tables as the input to the "Layer Name or Table View" field.
It also does not recognize database connections already defined .
(There are apparently similar issues with "Select Layer by Location", and "Select Layer by Attribute")

Please add all data types that it would normally accept when used from within an MXD.

[GrantCrosswell]

Yes the add join command in model builder needs to be more robust.  Its a bit flakey and I've had to go back to first principles & create py script to make a reliable solution.

[ChloeThomas]

Use Join Fields tool instead.