> ## Documentation Index
> Fetch the complete documentation index at: https://docs.auriko.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# tools_not_supported

> HTTP 400 — Model does not support tool/function calling.

## HTTP status

`400 invalid_request_error`

## Typical cause

The request includes a `tools` array but the selected model does not support tool or function calling.

## Resolution

Remove the `tools` parameter or choose a model that supports function calling.