MediaViewer displays the contents of the Permission field of the information template in a box on the metadata panel. This information is rarely useful, and not consistent (can be the license, the rephrasing of the license in free text, the authors favorite reformulation of the license, the author's extra requirements such as attribution or notification (which, depending on the license, can be a requirement or just a courtesy, and it is usually not clear which) or proof of the license's correctness (such as an OTRS template). Most images don't have this information at all.
Due to the inconsistency this field does more to confuse the user than to transmit any intelligible message to him; in the few cases where it is useful (e.g. attribution) there is, or should be, a proper machine-readable way to express that condition without ambiguity. MediaViewer should stop displaying this field.