MCP Chrome navigation: only one domain permission prompt per session

Bug Description

When using the Claude in Chrome MCP extension with navigate, only the first domain permission prompt appears per session. Subsequent navigations to different domains are silently blocked without showing a permission dialog.

Steps to Reproduce

1. Start a new Claude Code session with Claude in Chrome MCP
2. Use tabs_context_mcp with createIfEmpty: true
3. Navigate to a first domain (e.g., soumu.go.jp) → permission prompt appears, user approves, navigation succeeds
4. Navigate to a second domain (e.g., google.com or city.tachikawa.lg.jp) → no permission prompt appears, immediately returns error: Navigation to this domain is not allowed
5. Creating a new tab and retrying does not help

Expected Behavior

A permission prompt should appear for each new domain the user has not yet approved.

Actual Behavior

Only the first domain gets a permission prompt. All subsequent domains are blocked without prompting.

Environment

• OS: Windows 11 Home 10.0.26200
• Claude Code: CLI
• MCP: Claude in Chrome