Unknown tool: excel_read received by clients, logs show successful call

[madMathematician971]

Upon calling tool excel_read with next request body:

{
  "inputPath": "..<file_path>.xls(?x)",
  "includeHeaders": true
}

clients (Claude code, Cursor) receive response of:

Unknown tool: excel_read

However in Cursor MCP server settings the tool does show up and in logs of the server a successful tool call is logged:

2025-10-06 16:18:27.069 [info] Calling tool 'excel_read' with toolCallId: toolu_01VrKBEMKcFpqhYnuky2VAP7
2025-10-06 16:18:27.073 [info] Successfully called tool 'excel_read'

Cursor:

Version: 1.7.33
VSCode Version: 1.99.3
Commit: a84f941711ad680a635c8a3456002833186c4840
Date: 2025-10-03T03:28:06.574Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Darwin arm64 24.6.0

Claude code:
1.0.119 (Claude Code)