Constant READ_FILE_TOOL_DESCRIPTION 

pub const READ_FILE_TOOL_DESCRIPTION: &str = r#"Reads a file from the local filesystem.

Usage:
- The file_path parameter must be an absolute path, not a relative path
- By default, it reads up to 2000 lines starting from the beginning of the file
- You can optionally specify a line offset and limit for reading large files in chunks
- Any lines longer than 2000 characters will be truncated
- Results are returned with line numbers starting at 1
- Binary files cannot be read and will return an error"#;

ReadFile tool description constant.