diff --git a/packages/mcp/src/protocol-compat.test.ts b/packages/mcp/src/protocol-compat.test.ts
index 139b44db..c3d49360 100644
--- a/packages/mcp/src/protocol-compat.test.ts
+++ b/packages/mcp/src/protocol-compat.test.ts
@@ -98,6 +98,11 @@ describe('MCP protocol compatibility', () => {
       maxLength: 128,
       description: expect.stringMatching(/never pass conversation text/i),
     });
+    expect(
+      toolSchemas.get('get_container')?.properties?.include?.description,
+    ).toMatch(
+      /transport_events: Event summary.*get_container_transport_events/,
+    );
 
     for (const name of [
       'list_shipments',
diff --git a/packages/mcp/src/server.ts b/packages/mcp/src/server.ts
index f7e8ab18..072a73df 100644
--- a/packages/mcp/src/server.ts
+++ b/packages/mcp/src/server.ts
@@ -1105,7 +1105,7 @@ export function createTerminal49McpServer(
             "Optional related data to include. Default: ['shipment'] covers most use cases. " +
               '• shipment: Routing, BOL, line, ref numbers (lightweight, always useful) ' +
               '• pod_terminal: Terminal name, location, availability (lightweight, needed for demurrage questions) ' +
-              '• transport_events: Full event history, rail tracking (heavy 50-100 events, use for journey/timeline questions)',
+              '• transport_events: Event summary (count, rail event count, and latest event); use get_container_transport_events for the full timeline',
           ),
       }),
       outputSchema: z.object({}).passthrough(),