Using Schema.decodeUnknownSync() within schema transform definitions: Is it a good practice?

/** Schema for Notion Title property */
const NotionTitlePropertySchema = Schema.Struct({
  type: Schema.Literal("title"),
  title: Schema.Array(
    Schema.Struct({
      plain_text: Schema.String,
    }),
  ),
});
...
// Helper functions that decode Notion property types
const decodeTitle = (prop: unknown): string => {
  const decoded = Schema.decodeUnknownSync(NotionTitlePropertySchema)(prop);
  return decoded.title.map((t) => t.plain_text).join("");
};

const decodeRelation = (prop: unknown): string[] => {
  const decoded = Schema.decodeUnknownSync(NotionRelationPropertySchema)(prop);
  return decoded.relation.map((r) => r.id);
};

// Used inside transform decode functions
export const NotionCoveredAreaFromDatabase = Schema.transform(
  CoveredAreaDatabaseSchema,
  NotionCoveredArea,
  {
    decode: (page) => ({
      "URN": decodeTitle(page.properties["URN"]),
      "Preview tilesets": decodeRelation(page.properties["Preview tilesets"]),
      // ... more fields
    }),
    encode: () => { throw new Error("Not implemented"); },
  }
);