Thanks for your post. The only thing SQL Dependency Tracker will do at this point in time is show you what other objects are dependent on that particular object. With regards to PK's etc, since the tool only acts at the object level and not at the column level where the K's etc would be defined, this isn't possible either.
We do however have a feature request in place to incorporate column level dependencies within the tool, however I do not know if / when this is likely to be implemented. In the meantime, you may wish to take a look at SQL Prompt 5 as this will show which columns are the PK and FK in your DB and also list other dependencies.
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