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fix: built-in tools disappear when a model has a custom tools parameter (#32530)

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Adding a custom parameter named tools to a model, for example to turn on a provider's native web search, made Open WebUI drop all of its own tools for that model: notes, knowledge, tasks and any tools attached to the model stopped working, and attached files lost their context. Those tools now stay, and the model's custom tools are sent alongside them. API calls that pass their own tools, or an empty list to turn tools off, behave as before.

Fixes #32528
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Classic298 2026-10-16 12:09:32 +02:00 • committed by GitHub
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backend/open_webui/utils/middleware.py
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@ -2059,6 +2059,7 @@ async def process_chat_payload(request, form_data, user, metadata, model):
# Keep the template before apply_params_to_form_data consumes the model parameters.
model_system_prompt_template = (form_data.get('params') or {}).get('system')
payload_tools = form_data.get('tools', None) # snapshot before filters
form_data = apply_params_to_form_data(form_data, model)
log.debug('form_data: %s', form_data)
@ -2070,7 +2071,6 @@ async def process_chat_payload(request, form_data, user, metadata, model):
chat_id = metadata.get('chat_id')
user_message_id = metadata.get('user_message_id')
pending_assistant_message = None
payload_tools = form_data.get('tools', None) # snapshot before filters
chat = await Chats.get_chat_by_id(chat_id) if is_saved_chat_id(chat_id) else None
is_note_chat = bool(chat and (chat.meta or {}).get('internal') is True and (chat.meta or {}).get('type') == 'note')
use_builtin_tools = is_note_chat or (