The verdict
For a small team with one or two modest accounts, pick Google Ads on its own. You can check everything by eye in ten minutes, and a paid tool adds little. Fix your conversion tracking before you add anything else.
If you manage meaningful spend across several accounts, and the routine checks eat your week, add Optmyzr. Overspending budgets, wasted search terms and disapproved ads are the kind of thing its rules and alerts catch. Changes made through its MCP server are staged for a person to approve, which suits teams that do not want a black box adjusting spend.
The Google Ads account comes first in every case.