The ListMetadataQuery parameter represents a list of objects that specify which components you are interested in.
Optional
The folder associated with the component. This field is required for components that use folders, such as Dashboard, Document, EmailTemplate, or Report.
Dashboard
Document
EmailTemplate
Report
Required. The metadata type, such as CustomObject, CustomField, or ApexClass.
CustomObject
CustomField
ApexClass
The ListMetadataQuery parameter represents a list of objects that specify which components you are interested in.