Design versioning or diffs through MCP?

When a designer has updated a design, what is the best way to express design updates through MCP to a model? I did not see any tool that would facilitate. Does anyone know if Figma will add versioning or diffs through an MCP tool? If not, is there an established best practice that like storing all the json data from get_design_context and get_metadata into a snapshot file to compare with when there are updates?