diff --git a/server/src/mcp/tools.ts b/server/src/mcp/tools.ts
index bdbfd7f5..933a996e 100644
--- a/server/src/mcp/tools.ts
+++ b/server/src/mcp/tools.ts
@@ -228,13 +228,14 @@ export function registerTools(server: McpServer, userId: number): void {
         website: z.string().max(500).optional(),
         phone: z.string().max(50).optional(),
         transport_mode: z.enum(['walking', 'driving', 'cycling', 'transit', 'flight']).optional(),
+        osm_id: z.string().optional().describe('OpenStreetMap ID from search_place (e.g. "way:12345") — create-only field, normally not updated'),
       },
       annotations: TOOL_ANNOTATIONS_WRITE,
     },
-    async ({ tripId, placeId, name, description, lat, lng, address, category_id, price, currency, place_time, end_time, duration_minutes, notes, website, phone, transport_mode }) => {
+    async ({ tripId, placeId, name, description, lat, lng, address, category_id, price, currency, place_time, end_time, duration_minutes, notes, website, phone, transport_mode, osm_id }) => {
       if (isDemoUser(userId)) return demoDenied();
       if (!canAccessTrip(tripId, userId)) return noAccess();
-      const place = updatePlace(String(tripId), String(placeId), { name, description, lat, lng, address, category_id, price, currency, place_time, end_time, duration_minutes, notes, website, phone, transport_mode });
+      const place = updatePlace(String(tripId), String(placeId), { name, description, lat, lng, address, category_id, price, currency, place_time, end_time, duration_minutes, notes, website, phone, transport_mode, osm_id });
       if (!place) return { content: [{ type: 'text' as const, text: 'Place not found.' }], isError: true };
       safeBroadcast(tripId, 'place:updated', { place });
       return ok({ place });
diff --git a/server/src/services/placeService.ts b/server/src/services/placeService.ts
index 640de1e3..23c7a464 100644
--- a/server/src/services/placeService.ts
+++ b/server/src/services/placeService.ts
@@ -141,7 +141,7 @@ export function updatePlace(
     category_id?: number; price?: number; currency?: string;
     place_time?: string; end_time?: string;
     duration_minutes?: number; notes?: string; image_url?: string;
-    google_place_id?: string; website?: string; phone?: string;
+    google_place_id?: string; osm_id?: string; website?: string; phone?: string;
     transport_mode?: string; tags?: number[];
   },
 ) {
@@ -151,7 +151,7 @@ export function updatePlace(
   const {
     name, description, lat, lng, address, category_id, price, currency,
     place_time, end_time,
-    duration_minutes, notes, image_url, google_place_id, website, phone,
+    duration_minutes, notes, image_url, google_place_id, osm_id, website, phone,
     transport_mode, tags,
   } = body;
 
@@ -171,6 +171,7 @@ export function updatePlace(
       notes = ?,
       image_url = ?,
       google_place_id = ?,
+      osm_id = ?,
       website = ?,
       phone = ?,
       transport_mode = COALESCE(?, transport_mode),
@@ -191,6 +192,7 @@ export function updatePlace(
     notes !== undefined ? notes : existingPlace.notes,
     image_url !== undefined ? image_url : existingPlace.image_url,
     google_place_id !== undefined ? google_place_id : existingPlace.google_place_id,
+    osm_id !== undefined ? osm_id : existingPlace.osm_id,
     website !== undefined ? website : existingPlace.website,
     phone !== undefined ? phone : existingPlace.phone,
     transport_mode || null,