Most structures come with an accurate preview, usually backed by an .nbt file
The structure location itself comes with a lot of controls, in term of what you are or are not allowed to search
If enabled, the loot tables of the structure, with the estimated drop chances, are shown
Alongside the preview is the complete list of blocks in the structure, if enabled
If enabled, you can see the entities this structure generates, including spawners
For any external provider, the Structure Capture Ruler can be used to easily capture every metadata needed and wrap it into an .nbt file