MCP tools return "Connection revoked" when used by an AI client

How to reproduce:

1. Create a new project
2. Install the Assistant package
3. Open “Project Settings → AI → Assistant MCP Extensions” and ensure that the “Enable MCP Tools” option is enabled
4. Configure and launch an AI client
5. Open “Project Settings → AI → Unity MCP Server” and ensure that the connection from the AI client is approved
6. In the AI client, send a prompt which would use one of the available tools
7. Observe the AI client response

Actual result: Using the tool fails and connection shows up as revoked
Expected result: The tool is used successfully

Reproducible with: 2.7.0-pre.1 (6000.6.0a4)
Not reproducible with: 2.6.0-pre.1 (6000.6.0a4)

Reproducible on: Windows 11
Not reproducible on: No other enviornments tested

Notes:

• Tested using Cursor as the AI client
• Prompt used for testing: “Use the manage game object tool from unity, provide the raw response”
• Response from AI client: “ { "success": false, "error": "Connection revoked. Go to Unity Editor > Project Settings > AI > Unity MCP to change approval." }

  ”