What tolerance do you want to add ?
You can add a +/- as part of the hole call-out,
or if you require limits you may need to show a view with a dimension.
Actually it's not much like that but it's the best I can do.
You can then put +_ in the suffix with the appropriate valeu. Or you can put Min if appropriate. Or for limits as beach says you'd probably need to add a dimension in a section view or something.
If you mean you want to parametrically call up the hole depth then this is possible in several ways.
If you have a smart dimension on the hole, go to 'smart dimension prefix'. In the window that pops up you'll see over on the middle left a hole reference section. One of the options is hole depth. Simply select the suffix box, and click the relevant depth button. It will insert the required text to call up the hole depth.
Similar is available in callout, also in there you have the 'Smart Depth' and 'Hole Callout' tab to help you automate.
KENAT, probably the least qualified checker you'll ever meet...
