Does this issue occur when all extensions are disabled?: Yes

-Summary:
Submitting an MCP Elicitation Request with a field using schema format: 'email' results in an error when entering an email containing an @. The validation incorrectly rejects valid emails.

VS Code Version: 1.103.2
OS Version: macOS Sequoia 15.6

Steps to Reproduce:

1. Initiate an MCP Elicitation Request.
2. In any field expecting an email (format: 'email'), enter a valid address (e.g., user@example.com).
3. Observe: As soon as an @ is entered, an error message appears and the input is rejected.

Expected Behavior:
Email addresses containing an @ should be accepted as valid.

Actual Behavior:
Emails with an @ are erroneously rejected.

Does this issue occur when all extensions are disabled? Yes

Additional Context:

• Verified with VS Code Insiders, issue persists with all extensions disabled.
• No external extensions are affecting validation.