diff --git a/swh/provenance/interface.py b/swh/provenance/interface.py
--- a/swh/provenance/interface.py
+++ b/swh/provenance/interface.py
@@ -110,13 +110,14 @@
     @remote_api_endpoint("entity_get_all")
     def entity_get_all(self, entity: EntityType) -> Set[Sha1Git]:
         """Retrieve all sha1 ids for entities of type `entity` present in the provenance
-        model.
+        model. This method is used only in tests.
         """
         ...
 
     @remote_api_endpoint("location_get")
     def location_get(self) -> Set[bytes]:
-        """Retrieve all paths present in the provenance model."""
+        """Retrieve all paths present in the provenance model.
+        This method is used only in tests."""
         ...
 
     @remote_api_endpoint("origin_set_url")
@@ -176,7 +177,7 @@
     @remote_api_endpoint("relation_get_all")
     def relation_get_all(self, relation: RelationType) -> Set[RelationData]:
         """Retrieve all entries in the selected `relation` that are present in the
-        provenance model.
+        provenance model. This method is used only in tests.
         """
         ...