Clients send tool_choice=auto; without these flags vLLM rejects with HTTP 400. The Avesed chat template renders the Qwen3 XML tool format, so qwen3_xml is the matching parser.
Clients send tool_choice=auto; without these flags vLLM rejects with HTTP 400. The Avesed chat template renders the Qwen3 XML tool format, so qwen3_xml is the matching parser.