Two changes to make the LLM more likely to call the tool:
1. Lead the docstring with an unambiguous directive — "Create an image
and show it to the user. Use this whenever the user asks you to
draw, generate, ..." plus a hard "do not say you cannot generate
images" line. Open WebUI feeds the docstring straight to the LLM as
the tool description; first line carries the most weight.
2. `style: Optional[StyleName]` where StyleName is a Literal enum of
the seven values. Native function-calling models read the type
annotation and present the seven valid values to the LLM as a
strict choice instead of a free-text param.
If the LLM still doesn't fire the tool, the install is probably wrong:
Workspace → Models → the model → Advanced Params → Function Calling
must be set to Native (not Default).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
57_WolveandClaude Opus 4.7
9e22de0328