MCP server worked with 1.49 and don't work with 1.50

**Describe the bug**

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A clear and concise description of what the bug is.

---

I made my own MCP server. (Python3, mcp>=1.0,<2)
It works very good with Goose 1.49 but after I updated to Goose 1.50 it breaks.

Goose shows me an error:
```
failed to initialize MCP client: uncorrelated error response: expected id 0, error response carried server-error
```

My MCP server shows an error:
```
[09/10/26 13:35:39] INFO Created new transport with session ID: a25c5d78f3c84167a1a86e0c86bf663a streamable_http_manager.py:302
INFO: 10.0.0.207:54932 - "POST /macrotracker/mcp HTTP/1.1" 400 Bad Request
```
If you want to see it, it available on https://github.com/DrMoriarty/ru-finance-mcp

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**Expected behavior**
It worked with 1.49 and I expect that it will works with 1.50 also.

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**Screenshots**

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**Please provide the following information**
- **OS & Arch:** MacOS 14.7.4 (23H420)
- **Interface:** UI
- **Version:** 1.50 (latest)
- **Extensions enabled:** My own MCP server
- **Provider & Model:** It doesn't matter

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**Additional context**
Add any other context about the problem here.

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