[Namespace mode] E2E prompt `Update vault <vault_name> in resource group <resource_group> to enable soft delete` triggers wrong tool

[Menghua1]

Description:
In Namespace modes, entering the E2E prompt Update vault <vault_name> in resource group <resource_group> to enable soft delete should trigger azurebackup_vault_update, but in actual testing, the triggered tool is azurebackup_governance_soft-delete, as shown in the image.

Steps to Reproduce:

1. Start mcp server in Namespace.
2. Open GitHub Copilot in VS Code and switch to Agent mode.
3. Click Refresh on the tools list, and select the MCP Server: Azure MCP.
4. Enter the test prompt.

Environment:

• OS: Windows.
• Vscode Version: 1.122.1
• Large Language Model: Claude Sonnet 4.6
• Azure MCP Server: 3.0.15

Expected Behavior:
These prompts can successfully trigger the expected mcp tool azurebackup_vault_update.

@RickWinter and @g2vinay for notification