fair-rose•3mo ago

query tool not returning any information only "success."

When creating an assistant we create a query tool as specified here in the docs https://docs.vapi.ai/knowledge-base/using-query-tool but when chatting with the assistant it seems to try to call the tool and never responds, we need to prompt it again before its able to take a turn, at which point it cannot answer questions answerable by content in the files that make up the knowledge base of the qeury tool here is one such call id: 76a85b63-2f5f-4cdb-b495-6e98cacab812 Thanks

Using the Query Tool for Knowledge Bases | Vapi

Learn how to configure and use the query tool to enhance your voice AI assistants with custom knowledge bases.

8 Replies

Vapi Support Bot•3mo ago

Suggestion:
Double-check that the files referenced in your query tool are correctly uploaded, under 300KB, and contain clear, well-structured information. In your assistant's configuration, ensure the knowledge base name and file IDs match exactly what was uploaded. If the tool call result is "Success." but no data is returned, try re-uploading your files and re-attaching them to the query tool, then test with a simple, direct query that matches content in your files. Example troubleshooting step:

# Re-upload a file and note the new file ID
curl --location 'https://api.vapi.ai/file' \
  --header 'Authorization: Bearer <YOUR_API_KEY>' \
  --form 'file=@"<PATH_TO_YOUR_FILE>"'

# Re-upload a file and note the new file ID
curl --location 'https://api.vapi.ai/file' \
  --header 'Authorization: Bearer <YOUR_API_KEY>' \
  --form 'file=@"<PATH_TO_YOUR_FILE>"'

Then update your query tool to use the new file ID and test again. If the issue persists, consider reaching out to Vapi support with your call ID and configuration details for further assistance. Sources: - Using the Query Tool for Knowledge Bases - Introduction to Knowledge Bases

⤵️ Mention @Vapi Support Bot for follow-ups 🐥

quickest-silver•3mo ago

Bumping this, @Vapi, it doesn't seem to work at all.

Sahil•3mo ago

Hey! To help track down this issue, could you share: - 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!

conscious-sapphire•3mo ago

@jack-lynq.ai @lpa Have you found the solution? Or maybe there's no problem at all and it just tells us with "success" that the info was retrieved and just don't show us? What model do you use btw?

Sahil•3mo ago

Hey Jack from lynq-ai, a gentle reminder to continue this thread.

other-emerald•3mo ago

hello i am also facing the same error, i tried to add a parameter with the api so the question of the user can be processed but it still doesnt work. the Hotel doesnt have a Restaurant should be the awnser. This is the Timestamp: "2025-06-14T09:32:27.548Z" and the Chat ID: 49047eae-406a-4fc1-85af-4a4d0164d354

Sahil•3mo ago

Hey Milan, this thread is from Jack at lynq.ai. I'm sorry, but you can't move your issue here. Instead, I suggest you create a new support ticket and share the information there. Don't forget to tag me as well.

other-emerald•3mo ago

oh i am sorry alright thanks

query tool not returning any information only "success."

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