[BUG] Aki UI MCP Server not working after Sonnet 3.7

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

After installed the Aki UI MCP Server, can not use it's tools, getting the error
{"message":"400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"tools: Tool names must be unique.\"},\"request_id\":\"req_011CV2Cq6A6fWVdFzkUErrRD\"}","status":400,"request_id":"req_011CV2Cq6A6fWVdFzkUErrRD","modelId":"claude-sonnet-4-5-20250929","providerId":"anthropic","details":{"type":"error","error":{"type":"invalid_request_error","message":"tools: Tool names must be unique."},"request_id":"req_011CV2Cq6A6fWVdFzkUErrRD"}}
Request ID: req_011CV2Cq6A6fWVdFzkUErrRD

it works perfect when using other brand models and also when using the Sonnet 3.7 it works OK
the Aki UI is a known MCP largly used it's website is at url https://aki-ui.akitect.io/ai/mcp
Please check and fix

What Should Happen?

Claude should be able to use the Aki UI MCP tools

Error Messages/Logs

"message":"400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"tools: Tool names must be unique.\"},\"request_id\":\"req_011CV2Cq6A6fWVdFzkUErrRD\"}","status":400,"request_id":"req_011CV2Cq6A6fWVdFzkUErrRD","modelId":"claude-sonnet-4-5-20250929","providerId":"anthropic","details":{"type":"error","error":{"type":"invalid_request_error","message":"tools: Tool names must be unique."},"request_id":"req_011CV2Cq6A6fWVdFzkUErrRD"}}
Request ID: req_011CV2Cq6A6fWVdFzkUErrRD

Steps to Reproduce

use any agentic ai (I have used Cline) set the model used (using the API) to Claude Sonnet 4.5 (4, and Opus 4.1 did the same)
install the Aki Ui mcp server - get it from here https://aki-ui.akitect.io/ai/mcp
then try to use one of it's tools for example list_all_components or get_theme
and the error will occure, try to replace the model to Sonnet 3.7 for example and you will see that the mcp works fine and returns answers

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

Sonnet 3.7

Claude Code Version

1.0.53

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

<img width="1658" height="680" alt="Image" src="https://github.com/user-attachments/assets/5b099a54-1347-4187-9aba-4a369cea4983" /> not working

<img width="1522" height="671" alt="Image" src="https://github.com/user-attachments/assets/80b513a3-634d-4fbf-af2e-8f4000932a44" /> Working example