Help：Unable to set API key for Custom Tool

[challenge1979]

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1. Is this request related to a challenge you're experiencing? Tell me about your story.

Dify version
0.7.1

Cloud or Self Hosted
Cloud

I created a custom tool and set the api key to "parameters"(as "default") in Schema. But every time this tool was called, the agent would ask me to provide the api key. And it did work after I provided the api key. I guess it should be possible to skip this manual keying in process. Could anybody help me in solving this problem? Thank you in advance!

Here's the Schema:

{
  "openapi": "3.1.0",
  "info": {
    "title": "Douyin Hot Topics API",
    "description": "API for fetching trending topics from Douyin.",
    "version": "v1.0.0"
  },
  "servers": [
    {
      "url": "https://apis.tianapi.com"
    }
  ],
  "paths": {
    "/douyinhot/index": {
      "post": {
        "description": "Fetch trending topics from Douyin.",
        "operationId": "fetchDouyinHotTopics",
        "parameters": [
          {
            "name": "key",
            "in": "query",
            "required": true,
            "schema": {
              "type": "string",
              "default": "123456789"
            },
            "description": "API key for authentication."
          }
        ],
        "responses": {
          "200": {
            "description": "A list of trending topics from Douyin.",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "code": {
                      "type": "integer",
                      "example": 200
                    },
                    "msg": {
                      "type": "string",
                      "example": "success"
                    },
                    "result": {
                      "type": "object",
                      "properties": {
                        "list": {
                          "type": "array",
                          "items": {
                            "type": "object",
                            "properties": {
                              "hotindex": {
                                "type": "integer",
                                "description": "Popularity index of the topic."
                              },
                              "label": {
                                "type": "integer",
                                "description": "Category label of the topic."
                              },
                              "word": {
                                "type": "string",
                                "description": "Description of the trending topic."
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        },
        "deprecated": false
      }
    }
  }
}

Here's the configuration panel:

Here's the reaction when the tool is called:

2. Additional context or comments

No response

[challenge1979]

Could anybody help me with this problem?