It would have to be a custom action specifically for Coverity, since it's highly likely that every static analysis tool uses different command-line flags. But it doesn't appear that Coverity makes their product easily available for evaluation, which would be needed for us to integrate into VBP. In addition to calling from a Run Program action, you could wrap it with a
custom user action.
Now, if Coverity would just support the same flags as msdev (or a superset), the Make VC6 action could continue to be used by overriding the default msdev location and specifying any Coverity-specific flags in the additional values field.