Hi Shmiggy,
Sorry — deleted tools cannot be restored. If assistants still reference the deleted tool IDs, remove those IDs from the assistant configuration (either via the dashboard Tools tab or the API) so the assistant stops trying to call non‑existent tools. See the API get/update docs for guidance:
- Update tool list:
https://docs.vapi.ai/api-reference/tools/update
- Get tool details (to confirm IDs):
https://docs.vapi.ai/api-reference/tools/get
- Delete tool (if you need to remove a stuck entry via API):
https://docs.vapi.ai/api-reference/tools/delete
If you want, share the assistant IDs and the invalid tool IDs (or a time window when the tools existed) and I can advise the exact API request payload to clear them.