Unable to answer "Is this a one-way street? In which direction?" – Siltavuorenpenger (Living Street) – https://osm.org/way/34918425 via StreetComplete 63.0:

Tie on kiviesteillä poikki sisäpihan itäreunan kohdalta.

Attached photo(s):
https://streetcomplete.app/p/333585.jpg