aws-lint-iam-policies is a command-line tool that performs automated security linting checks on AWS IAM policies across single accounts or entire AWS Organizations. The tool extracts and analyzes both identity-based and resource-based IAM policies from AWS environments, identifying violations of security best practices and policy configuration errors. It leverages AWS IAM Access Analyzer's policy validation feature to conduct the actual linting operations, utilizing the same validation logic that AWS provides in the Console UI. The tool supports two operational scopes: single AWS account analysis and organization-wide analysis across all member accounts. For single account operations, it requires specific IAM permissions to read and analyze policies. For organization-wide operations, it must be executed from the AWS Organizations management account with elevated permissions and requires properly configured cross-account IAM roles in member accounts. The tool integrates with standard AWS credential configuration methods, supporting both environment variables and named AWS profiles for authentication. It generates comprehensive reports detailing policy violations and security recommendations based on AWS-maintained linting rules and best practices.