feat: let get_trip resolve a date code to its trip and date

src/Chatbot/Mcp/Tool/GetTripTool.php

@@ -14,7 +14,7 @@ use Mcp\Schema\ToolAnnotations;
 
 #[McpTool(
     name: 'get_trip',
-    description: 'Full details of one trip: description, included services, programme, hotel, all upcoming dates with rooms, prices per person in EUR and availability, pickup points and departure times, FAQs. Use after search_trips, or when the user names a specific trip. Prices and availability are a snapshot as of dataAsOf; the booking page is binding.',
+    description: 'Full details of one trip: description, included services, programme, hotel, all upcoming dates with rooms, prices per person in EUR and availability, pickup points and departure times, FAQs. Use after search_trips, or when the user names a specific trip or a booked date (date codes such as SSLMP061226 narrow the answer to that date). Prices and availability are a snapshot as of dataAsOf; the booking page is binding.',
     annotations: new ToolAnnotations(readOnlyHint: true, openWorldHint: false),
 )]
 final class GetTripTool
@@ -26,7 +26,7 @@ final class GetTripTool
     }
 
     public function __invoke(
-        #[Schema(description: 'Trip code, as returned by search_trips.', minLength: 1)]
+        #[Schema(description: 'Trip code as returned by search_trips, or a date code (dateCode) for one date of a trip.', minLength: 1)]
         string $code,
         #[Schema(description: 'Narrows the dates to one hotel when a trip has several.')]
         ?string $hotelCode = null,
@@ -35,7 +35,7 @@ final class GetTripTool
             $trip = $this->catalog->get(trim($code), $hotelCode);
 
             if (null === $trip) {
-                throw new ToolCallException(sprintf('No trip with code "%s". Use search_trips to find trip codes.', $code));
+                throw new ToolCallException(sprintf('No trip or date with code "%s". Use search_trips to find trip codes.', $code));
             }
 
             return $trip;