Adding tools or plugins to the agent module fails to function properly

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### Dify version

1.17.0、1.16.1

### Cloud or Self Hosted

Self Hosted (Docker)

### Steps to reproduce

Add tools to the Agent's tool list.
1. The parameters of the tool cannot be set manually.
2. There is an issue with the model used in the tool. The process of "model -> save -> apply to agent" is ineffective.

### ✔️ Expected Behavior

Please make the configuration of the tool compatible so that it can be used normally.

### ❌ Actual Behavior

Add tools to the Agent's tool list.
1. The parameters of the tool cannot be set manually.
2. There is an issue with the model used in the tool. The process of "model -> save -> apply to agent" is ineffective.

Reproduce the issue in the self-hosted Docker setup by adding tools to an Agent's tool list and following the model save/apply flow. Trace the Agent tool configuration and model-selection entry points; the fix is complete when tool parameters can be set manually and the selected model persists after saving and applying it to the Agent.

Written by the indexing model from the issue text.