We have three functions tools assigned to an agent - The first is to calculate a quote - this was working fine yesterday and suddenly today it is not working. The other two calls are to Google Calendars to check available dates and to book the project. These were also working fine yesterday. I don't understand why the agent is so unreliable day-to-day when there have been no changes in the setting. We are on OpenAI Cluster 4.0 and using 11Labs, Deepgram Turbo and LiveKit end point. Please provide insights or guidance on what's going on. Thank you @DebFiore

Thank you for the details. To help diagnose why your tool calls (quote calculation and Google Calendar functions) suddenly stopped working on OpenAI Cluster 4.0 with 11Labs, Deepgram Turbo, and LiveKit, could you please check your recent call logs and let me know if you see any specific error codes or endedReason values for the failed calls? This information will help identify if the issue is related to a pipeline error, integration problem, or something else. Sources: - [Call ended reasons documentation](https://docs.vapi.ai/calls/call-ended-reason) - [Vapi tool calling integration guide](https://docs.vapi.ai/customization/tool-calling-integration) - [Vapi Discord known issues](https://discord.com/channels/1211482211119796234/1372358449761091584)

Here is the call log for the call where the tool failed https://cdn.discordapp.com/attachments/1417542846356918353/1417544120393793567/call-logs-2025-09-16T16-13-41-569Z.json?ex=68cade56&is=68c98cd6&hm=cd133bab309e55415eb293a94bb053d130bf7acd3819b768c18333f7d2a3d1ac&

Same thing happening to me!

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