chore: set search_object readonly

Author: tianzhou

src/server.ts

@@ -143,7 +143,7 @@ See documentation for more details on configuring database connections.
     // Print sources and tools table
     const sourceDisplayInfos = buildSourceDisplayInfo(
       sources,
-      (sourceId) => getToolsForSource(sourceId).map((t) => t.name),
+      (sourceId) => getToolsForSource(sourceId).map((t) => t.readonly ? `🔒 ${t.name}` : t.name),
       isDemo
     );
     console.error(generateStartupTable(sourceDisplayInfos));

src/utils/tool-metadata.ts

@@ -246,6 +246,7 @@ function buildSearchObjectsTool(sourceId: string): Tool {
         description: "Max results (default: 100, max: 1000)",
       },
     ],
+    readonly: true, // search_objects is always readonly
   };
 }