To ensure that only valid metadata is shown for a particular asset type, you should define a metadata schema and apply it to the relevant folder:

Define a Metadata Schema:

Create a metadata schema that includes only the fields relevant to the asset type.

Configure the schema to enforce any mandatory fields and validation rules.

Apply the Schema to a Specific Folder:

Navigate to the folder containing the assets in AEM DAM.

Apply the metadata schema to the folder so that all assets within it will adhere to the schema.

References:

AEM Assets documentation on creating and applying metadata schemas.

Best practices for managing metadata in AEM to ensure consistency and accuracy.