Create metadata cascade policyBOX_CREATE_METADATA_CASCADE_POLICY
Creates a new metadata cascade policy that automatically applies a metadata template to all files and subfolders within a specified folder. Prerequisites: - A metadata instance must already be applied to the target folder before creating the cascade policy. - The target folder cannot be the root folder (ID '0'). - Enterprise admin must have enabled 'Cascading Folder Level Metadata' in Admin Console > Enterprise Settings > Content & Sharing. Common use case: After applying metadata to a folder, create a cascade policy to ensure all new items added to that folder automatically inherit the metadata. Returns: A MetadataCascadePolicy object with id, type, owner_enterprise, parent, scope, and templateKey fields. Error codes: - 400: Invalid format for scope, templateKey, or folder_id - 403: Policy cannot apply to restricted folders (e.g., root folder) - 404: Folder or template not found/inaccessible - 409: Duplicate policy already exists for this folder/template combination