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MCP server returns "float" type instead of "number" for tool input schema #16834

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opened 2026-02-21 19:28:06 -05:00 by yindo · 0 comments
yindo commented 2026-02-21 19:28:06 -05:00
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Originally created by @estvita on GitHub (Sep 6, 2025).

Self Checks

  • I have read the Contributing Guide and Language Policy.
  • 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, otherwise it will be closed.
  • 【中文用户 & Non English User】请使用英语提交，否则会被关闭 ：）
  • Please do not modify this template :) and fill in all the required fields.

Dify version

1.8.1

Cloud or Self Hosted

Cloud

Steps to reproduce

#25048 the fix does not have the desired effect

I created a mcp server in your cloud and instead of a number a float is returned there

curl -X POST  https://api.dify.ai/mcp/server/WZG4bEt2TDOCLBa9/mcp\
  -H "Content-Type: application/json" \
  -d '{"method": "tools/list", "jsonrpc": "2.0", "id": 1}'

returns

{
    "jsonrpc": "2.0",
    "id": 1,
    "result": {
        "tools": [
            {
                "name": "123",
                "description": "test",
                "inputSchema": {
                    "type": "object",
                    "properties": {
                        "test": {
                            "description": "",
                            "type": "float"
                        }
                    },
                    "required": [
                        "test"
                    ]
                }
            }
        ]
    }
}
Image

✔️ Expected Behavior

The MCP server should return "number" instead of "float" for fields of type "number" in the workflow.

❌ Actual Behavior

Currently, the server returns the type "float".

Originally created by @estvita on GitHub (Sep 6, 2025). ### Self Checks - [x] I have read the [Contributing Guide](https://github.com/langgenius/dify/blob/main/CONTRIBUTING.md) and [Language Policy](https://github.com/langgenius/dify/issues/1542). - [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, otherwise it will be closed. - [x] 【中文用户 & Non English User】请使用英语提交，否则会被关闭 ：） - [x] Please do not modify this template :) and fill in all the required fields. ### Dify version 1.8.1 ### Cloud or Self Hosted Cloud ### Steps to reproduce #25048 the fix does not have the desired effect I created a mcp server in your cloud and instead of a number a float is returned there ``` curl -X POST https://api.dify.ai/mcp/server/WZG4bEt2TDOCLBa9/mcp\ -H "Content-Type: application/json" \ -d '{"method": "tools/list", "jsonrpc": "2.0", "id": 1}' ``` returns ``` { "jsonrpc": "2.0", "id": 1, "result": { "tools": [ { "name": "123", "description": "test", "inputSchema": { "type": "object", "properties": { "test": { "description": "", "type": "float" } }, "required": [ "test" ] } } ] } } ``` <img width="925" height="979" alt="Image" src="https://github.com/user-attachments/assets/d93b40f0-cd0e-4681-872f-9be79722df7f" /> ### ✔️ Expected Behavior The MCP server should return "number" instead of "float" for fields of type "number" in the workflow. ### ❌ Actual Behavior Currently, the server returns the type "float".
yindo added the 🌊 feat:workflow label 2026-02-21 19:28:06 -05:00
yindo closed this issue 2026-02-21 19:28:06 -05:00
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Reference: langgenius/dify#16834
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