1. A system comprising: a communication interface operable to establish a data connection with a target virtual hosting platform; a primary metadata tagging repository for virtual machines hosted by the target virtual hosting platform, the metadata tagging repository comprising: a metadata tag identifier set; and a metadata tag content set linked to the metadata tag identifier set; proxy circuitry coupled to the communication interface and the metadata tagging repository, the proxy circuitry configured to: make a determination of whether the target virtual hosting platform provides native metadata tagging capability, the native metadata tagging capability comprising implementation of an interface console configured to modify metadata tags; proxy metadata tag identifiers to the metadata tag identifier set in the primary metadata tagging repository; proxy metadata tag content to the metadata tag content set in the primary metadata tagging repository; and responsive to the determination, synchronize, in accord with a ruleset, the metadata tag identifiers and metadata tag content, when the determination is that the target virtual hosting platform provides native metadata tagging capability, by transmitting an instruction message over the data connection to direct the target virtual hosting platform to synchronize provider metadata tagging repository of the target virtual hosting platform to the metadata tag identifiers and the metadata tag content, the ruleset specifying obtaining a decision from a requester before overwriting metadata tags during synchronization; and operator control circuitry configured to initiate provisioning, by the target virtual hosting platform, of a virtual machine in accord with the metadata tag content.