agent node can not use tools because error occurs #10681

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opened 2026-02-21 18:49:52 -05:00 by yindo · 0 comments
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Originally created by @ChengSongyang on GitHub (Mar 12, 2025).

Self Checks

  • This is only for bug report, if you would like to ask a question, please head to Discussions.
  • I have searched for existing issues search for existing issues, including closed ones.
  • I confirm that I am using English to submit this report (我已阅读并同意 Language Policy).
  • [FOR CHINESE USERS] 请务必使用英文提交 Issue,否则会被关闭。谢谢!:)
  • Please do not modify this template :) and fill in all the required fields.

Dify version

1.0.0 and 1.0.1

Cloud or Self Hosted

Self Hosted (Docker)

Steps to reproduce

when i try to create a simple agent node, the same error always occurs:

Image

✔️ Expected Behavior

invoke tools successfully

Actual Behavior

Failed to transform agent message: PluginInvokeError: {"args":{},"error_type":"ValidationError","message":"1 validation error for ReActParams\nmodel.entity\n Input should be a valid dictionary or instance of AIModelEntity [type=model_type, input_value=None, input_type=NoneType]\n For further information visit https://errors.pydantic.dev/2.8/v/model_type"}

Originally created by @ChengSongyang on GitHub (Mar 12, 2025). ### Self Checks - [x] This is only for bug report, if you would like to ask a question, please head to [Discussions](https://github.com/langgenius/dify/discussions/categories/general). - [x] I have searched for existing issues [search for existing issues](https://github.com/langgenius/dify/issues), including closed ones. - [x] I confirm that I am using English to submit this report (我已阅读并同意 [Language Policy](https://github.com/langgenius/dify/issues/1542)). - [x] [FOR CHINESE USERS] 请务必使用英文提交 Issue,否则会被关闭。谢谢!:) - [x] Please do not modify this template :) and fill in all the required fields. ### Dify version 1.0.0 and 1.0.1 ### Cloud or Self Hosted Self Hosted (Docker) ### Steps to reproduce when i try to create a simple agent node, the same error always occurs: ![Image](https://github.com/user-attachments/assets/f7b3da42-01d7-4fa8-b6ad-a6b832de398f) ### ✔️ Expected Behavior invoke tools successfully ### ❌ Actual Behavior Failed to transform agent message: PluginInvokeError: {"args":{},"error_type":"ValidationError","message":"1 validation error for ReActParams\nmodel.entity\n Input should be a valid dictionary or instance of AIModelEntity [type=model_type, input_value=None, input_type=NoneType]\n For further information visit https://errors.pydantic.dev/2.8/v/model_type"}
yindo added the 🐞 bug label 2026-02-21 18:49:52 -05:00
yindo closed this issue 2026-02-21 18:49:52 -05:00
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Reference: langgenius/dify#10681