Llama 4 tool not triggering

Forum
1

Hi all,

I’ve been seeing some strange responses since yesterday when using the llama4 maverick model.
I have a tool attached named - `proceed_to_next_step` but instead of the model actually making a tool call, it gives the below text in response content.

{
  "role":"assistant",
  "content":"<proceed_to_next_step>{\"step\": {\"step_name\": \"Publish\"}}</function>"
}

Did something change or is anyone else also facing the same? I tried with qwen3-32b and works fine, happening specifically for llama4.
Any suggestions to fix this?

2

Hi ​@milind97, this seems like a quirk with how llama4 and that tool’s name.

If trying with Qwen3 or Kimi K2 doesn’t cause these problems, it might be a llama4-specific problem. Are you using Scout or Maverick?

Either way, try to update your system prompt to control for that tool’s name, or try renaming the tool name.