Test Chat Works but Production Calls Don't

Voxinity's test chat in the agent editor uses the exact same prompt-assembly pipeline as production SMS. If the test passes but production fails, the gap is almost always one of three things:

1. A tool is enabled in the agent's Tools list but not actually configured (missing URL, missing parameters). Real calls fire it and fail; test chat simulates so it never breaks.
2. Variables referenced in the prompt aren't being populated. Open Call History → click the failed call → Variables tab → check which variables came back empty.
3. ElevenLabs config drift. Test chat doesn't touch EL; production does. Run Admin → ElevenLabs Health → Re-sync Agent.