Vapi assistant breaks when it tries to use a tool
# support
k
Vapi just stops responding after an attemp to use a tool. It doesn't give any errors it just stops. This happens on both query tools and function tools. Any idea on to what the issue might be? https://cdn.discordapp.com/attachments/1368979802585039018/1368979802819657901/Screenshot_2025-05-05_185615.png?ex=681a314b&is=6818dfcb&hm=b4c26fd8ab5834f6d043ca65911ffab18365b86aab659ca7b520926a18a4074b&
v
### Check Your Tool Response Format The most common cause for Vapi assistants stopping after tool calls is incorrect response formatting. Ensure your tool response follows this exact structure:
Copy code
json
{
  "results": [
    {
      "toolCallId": "<your-tool-call-id>",
      "name": "<your-function-name>",
      "result": "Success" // Single-line string with no line breaks
    }
  ]
}
Make sure the tool is set to
synchronous
mode in your configuration. Sources: - [Discord discussion about tool response format](https://discord.com/channels/1211482211119796234/1342188078437236916) - [Discord discussion about synchronous tool setting](https://discord.com/channels/1211482211119796234/1342315282198298729)
k
@Vapi Support Bot This happens on both the query tools and the function tools. And Also I don't have any control over it. The setup was all from the dashboard, it uses the internal vapi api system configurations
v
### Contact Vapi Support with Call ID Since you're using dashboard-configured tools with limited control over internal configurations, this is likely a platform issue. Contact Vapi support with your call ID, timestamp, and expected vs. actual responses for investigation. To find your call ID: Check the dashboard logs for the specific call where the tool failure occurred. Sources: - [Discord discussion about tool not firing](https://discord.com/channels/1211482211119796234/1335141023600480318) - [Discord discussion about finding call ID](https://discord.com/channels/1211482211119796234/1340404440892444742)
k
Send your call id
k
@Kings_big💫 Ok. Here is the call id:
3d094a95-7fcc-4f22-a21d-42a9eb1f5dfb
Thanks for the assistant
k
Looking into it
k
Were there any updates on this issue?
k
No update yet it was weekend
3 Views