I gave my AI Caller a custom knowledge base (pdf) with under 300kb of context. At first i provided it as a file within the assistant, but he couldnt acess it. So i created a query tool call to the knowledgebase wihtin VAPI. Now I finally got the assistant to use the tool when i ask a question, but for some reason, after the tool returns the correct answer, he does not say it out loud. I have to ask again than he wont perform the toolcall anymore but will still answer correctly, any ideas why? Call ID: 7ecb406c-3161-4530-8822-7dd2814a7d2d Timestamp: 22. Juli 2025, 10:40 Expected return: as above described I expected the correct answers to my questions. Actual response: AI didnt say anything. Only after asking a 2nd time i got the correct answer.

Reach out my DM

Switch it to synchronous

async: false

, ensure your tool response is a clean JSON with

results

and no line breaks, and update the prompt to instruct the assistant to speak tool results aloud immediately..

My Vapi doesnt even show this option. Btw I am a, at best, low code developer/vibe coder. I have very limited understanding of programming. Also I dont really know where to find those settings in Vapi 😅

Hi, First off, we want to sincerely apologize for the delay in getting back to you. We understand how frustrating it is to wait - especially when you're counting on us - and we owe you a clear explanation of what’s been happening and how we’re addressing it. Over the past few weeks, we've seen a significant increase in support requests. While this reflects exciting growth, it has also stretched our small team and exposed some real challenges in scaling our support operations. To improve your experience, we’ve taken a step back to reassess our approach. Here’s what we’re implementing: - Smarter Support Through Automation: We’re investing in our AI support systems to help you resolve issues more efficiently. Soon, our support bot will offer expanded capabilities, making it easier to access accurate, instant help—particularly for common or repetitive queries. - Expanding the Support Team: To meet growing demand, we’re adding 2–3 new team members focused on managing support volume and improving response times. - Prioritized SLAs for High-Usage Accounts: We’re introducing service level improvements for users who are growing with us: - Accounts with usage over 1,000 minutes/month will receive prioritized support. - For all general inquiries, we’re establishing a standardized 48-hour response time. We’re confident these steps will lead to faster, more reliable support and help us better serve you as you grow with us. Also, in case you still need help with this ongoing ticket, do let us know, and we will help you get this resolved as soon as possible. Thank you for your continued patience and for being part of our journey. Warm regards, Vapi Team