update

src/tools/types.ts

@@ -0,0 +1,8 @@
+/** Platform tool: a server-side capability the frontend invokes explicitly
+ *  (uploads always go through tools — never raw to the model). */
+export interface PlatformTool {
+  readonly name: string;
+  readonly description: string;
+  isAvailable(): boolean;
+  unavailableReason(): string | null;
+}