tools/function call not working properly
# supporth
Himanshu
06/14/2025, 8:47 PMBad behaviour call id :44f34727-dfd1-4f00-b37a-28204ef3608d
correct behaviour call id :7dc1d68b-169f-40e4-9723-3ef8f4d52b10
I'm experiencing some inconsistent behavior with my assistant's tool-calling and could use some help diagnosing it. Sometimes the model correctly calls a function, and other times it just speaks out the action instead of executing it.
@Vapi @User @Shubham Bajaj
https://cdn.discordapp.com/attachments/1383548515107602694/1383548516797911170/image.png?ex=685914b7&is=6857c337&hm=be43a179b8f52ff525f6bcab16e8b2a903b56b0c2129538931cb4b48cb3af9f5&
https://cdn.discordapp.com/attachments/1383548515107602694/1383548517074866186/image.png?ex=685914b7&is=6857c337&hm=19df95f8a42973157bfb1e42052fd1c47d777bce8e3b64738f28f5c3cc74af50&
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cmmon
06/15/2025, 5:38 AMI have faced similar issue, i was able to come to some conclusions.
cmmon
06/15/2025, 5:40 AMThe function call for parameter less is just an empty body, which diverts all the request towards a single point.
If you create multiple endpoints, and then use in vapi.
Vapi will be able to use the appropriate function
cmmon
06/15/2025, 5:41 AMThere is a bug in vapi function call for sure,
cmmon
06/15/2025, 5:44 AMThis bug will be resolved if vapi move toward the open ai standard function format call.
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Himanshu
06/16/2025, 3:16 PM@thepaddyuknow
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Chiranjeet Mishra
06/17/2025, 12:35 AMHere is an improved assistant prompt that you can test.
https://cdn.discordapp.com/attachments/1383548515107602694/1384330536994082917/nia_prompt_improvement.json?ex=685209c7&is=6850b847&hm=fe57f4074603811dd24b9503d7f1ca9b3a6b74e242e069cc08e7259b6f9370bc&
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Himanshu
06/17/2025, 10:08 AMNo luck with this as well.
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thepaddyuknow
06/17/2025, 10:09 AMthis isn't working at all,
no triggering of function and discrepancies in the data spoken.
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Himanshu
06/17/2025, 10:11 AM@Shubham Bajaj @User @Kyle Brunker
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Himanshu
06/19/2025, 7:26 AMsure
Himanshu
06/20/2025, 7:05 AMYesterday we suppose to have call at our booked slot but no one showed up.
@Vapi@User @User
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Chiranjeet Mishra
06/20/2025, 6:37 PMWeird, can you please book one more call?
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Shubham Bajaj
06/20/2025, 9:50 PMHey @Himanshu ! To help track down this issue, could you share again:
• The Recent call ID
• When exactly this happened (the timestamp)
• What response you expected to get
• What response you actually got instead
This would really help us figure out what went wrong!
h
Himanshu
06/22/2025, 10:45 AM@Shubham Bajaj Bad behaviour call id :44f34727-dfd1-4f00-b37a-28204ef3608d (function didnt get call )
correct behaviour call id :7dc1d68b-169f-40e4-9723-3ef8f4d52b10(function call got call correctly )
response we expected to get- showphotos function should get called .
response we actually got instead- she says "call showPhotos" but didnt call it .
this has been seen in assistants multiple time . we are not sure if calling instruction through system prompt has been changed or what .
@thepaddyuknow Please attach you recent call id as well .
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Chiranjeet Mishra
06/24/2025, 3:19 AMThank you for sharing those details. We will look into it and get back to you shortly
Chiranjeet Mishra
06/25/2025, 5:46 AMJust keeping you updated, we are still looking into this issue. Thank you for your patience
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Himanshu
06/25/2025, 4:55 PMsure , Thanks
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Chiranjeet Mishra
06/27/2025, 12:50 AMReplace this in your prompt:
Copy code
"DO NOT SPEAK "SHOWPHOTOS" ONLY CALL THE FUNCTION.
EXAMPLES:
trigger showPhotos function "album 9" whenever discussing slide 9 content about founders, employees or experience." Copy code
"When you want to show a slide, call the showPhotos function with the appropriate album parameter. Never mention that you're calling a function - just call it silently and then describe what the slide shows."h
Himanshu
06/27/2025, 12:02 PMsure will let you know the results
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Chiranjeet Mishra
06/28/2025, 10:24 AMLet us know what the results are and we will standby in the meantime