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Assistant calls tools using “voice” but not “chat”
# support
t
My assistant successfully calls tools (both query and function) when I test using voice, either by calling or using the “Talk to Assistant” option in the dashboard.  However, when I use the “Chat” option in the dashboard, the assistant interacts but when it needs to call a tool, it stops and just hangs. See image. It knows the hat policy from the master prompt and is supposed to call a query tool for the location info. https://cdn.discordapp.com/attachments/1372296368332345364/1372296369196236800/Screenshot_2025-05-14_153328.png?ex=68264216&is=6824f096&hm=31e2a4dd5a30c6a69c8f27453605a2abcfc066894531317fe0b4ed2692c747e2&
v
This is a known issue: in the Vapi chat dashboard, tool calls may hang because the assistant sometimes does not return the expected message with tool call arguments, and the API may skip directly to the tool_call result. As a troubleshooting step, review any recent changes to your assistant's configuration or logic, and check your server logs for errors that might explain why the tool isn't triggered as expected. There is currently no documented fix or workaround for this chat-specific behavior. Sources: - [Vapi assistant tool calling chat interaction (Discord)](https://discord.com/channels/1211482211119796234/1332537726813343754) - [Troubleshoot Vapi assistant tool calling chat dashboard (Discord)](https://discord.com/channels/1211482211119796234/1334114042876264518)
This is a known issue with Vapi: in chat mode, the assistant sometimes does not return the expected message with tool call arguments and may hang or skip steps, unlike in voice mode where tool calling works as expected. As a first step, review your assistant and tool configurations to ensure nothing was recently changed that could affect tool calling. If the issue persists, check your server logs for errors and verify that tool call responses are formatted correctly. If these steps do not resolve the problem, you may need to contact Vapi support, as this may be a platform-level bug with chat tool calling behavior ([documentation](https://discord.com/channels/1211482211119796234/1332537726813343754)). Sources: - [Vapi assistant tool calling chat interaction (Discord)](https://discord.com/channels/1211482211119796234/1332537726813343754) - [Troubleshoot Vapi assistant tool calling not working (Discord)](https://discord.com/channels/1211482211119796234/1334114042876264518)
v
Message marked as helpful by @Trip | GenTekk AI! 🎉
k
checking if this is resolved/solved for you?
a
Hey, Could you please schedule a brief call at your convenience so we can discuss this matter in detail? Kindly use the following link to book a suitable time: .
t
Unfortunately, no.
a
The Chat feature is currently undergoing rework and will be back up and running within two weeks. I'll update you when we publish our chat API again. It's currently undergoing a rework, so it'll take time to make it working.
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