Unified Explanation Regarding the Issue of Unable to Invoke Tools

The primary reason tools cannot be invoked is that the model you're using isn't included in https://models.dev. You can search to see if your model exists. If it does exist, there might be an issue with the recorded capabilities for that model, indicating it doesn't support tool invocation. Alternatively, the model itself may inherently lack tool invocation capabilities, such as models in the Deepseek series.

The current workaround is to locate the corresponding model within its Provider on the Settings page and manually enable its Tool Calling capability: