Improve: Add empty array handling to bulk registration methods

- Add early return for empty arrays to avoid unnecessary notifications
- Add comprehensive tests for empty array edge cases
- Addresses O3 feedback from code review

Author: cameroncooke

src/server/mcp.test.ts

@@ -4625,6 +4625,36 @@ describe("elicitInput()", () => {
     });
   });
 
+  test("registerTools() should handle empty array gracefully", () => {
+    const mcpServer = new McpServer({
+      name: "test server",
+      version: "1.0",
+    });
+
+    const result = mcpServer.registerTools([]);
+    expect(result).toEqual([]);
+  });
+
+  test("registerResources() should handle empty array gracefully", () => {
+    const mcpServer = new McpServer({
+      name: "test server", 
+      version: "1.0",
+    });
+
+    const result = mcpServer.registerResources([]);
+    expect(result).toEqual([]);
+  });
+
+  test("registerPrompts() should handle empty array gracefully", () => {
+    const mcpServer = new McpServer({
+      name: "test server",
+      version: "1.0", 
+    });
+
+    const result = mcpServer.registerPrompts([]);
+    expect(result).toEqual([]);
+  });
+
   test("registerPrompts() should register multiple prompts with single notification", async () => {
     const mcpServer = new McpServer({
       name: "test server",

src/server/mcp.ts

@@ -677,6 +677,10 @@ export class McpServer {
     config: ResourceMetadata;
     callback: ReadResourceCallback | ReadResourceTemplateCallback;
   }>>(resources: T): (RegisteredResource | RegisteredResourceTemplate)[] {
+    if (resources.length === 0) {
+      return [];
+    }
+    
     const results: (RegisteredResource | RegisteredResourceTemplate)[] = [];
 
     // First, validate that none of the resources are already registered
@@ -736,6 +740,10 @@ export class McpServer {
     };
     callback: PromptCallback<PromptArgsRawShape | undefined>;
   }>>(prompts: T): RegisteredPrompt[] {
+    if (prompts.length === 0) {
+      return [];
+    }
+    
     const results: RegisteredPrompt[] = [];
 
     // First, validate that none of the prompts are already registered
@@ -1070,6 +1078,10 @@ export class McpServer {
     };
     callback: ToolCallback<ZodRawShape | undefined>;
   }>>(tools: T): RegisteredTool[] {
+    if (tools.length === 0) {
+      return [];
+    }
+    
     const results: RegisteredTool[] = [];
 
     // First, validate that none of the tools are already registered