Update READMEs to include minimum information

[hideya]

Update READMEs to include minimal information for the convenience of readers

Motivation and Context

How Has This Been Tested?

Checked updated documents in my local branch using Preview

Breaking Changes

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Documentation
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have added or updated documentation as needed

Additional context

[zckly]

Thanks for this!