Implement validated method in Request.php

src/Request.php

@@ -76,6 +76,48 @@ public function validate(array $rules, array $messages = [], array $attributes =
         return Validator::validate($this->all(), $rules, $messages, $attributes);
     }
 
+    /**
+     * Get custom rules for validator errors.
+     *
+     * @return array<string, \Illuminate\Contracts\Validation\ValidationRule|array<mixed>|string>
+     */
+    public function rules(): array
+    {
+        return [];
+    }
+
+    /**
+     * Get custom messages for validator errors.
+     *
+     * @return array<string, string>
+     */
+    public function messages(): array
+    {
+        return [];
+    }
+
+    /**
+     * Get custom attributes for validator errors.
+     *
+     * @return array<string, string>
+     */
+    public function attributes(): array
+    {
+        return [];
+    }
+
+    /**
+     * Get the validated data from the request.
+     *
+     * @return array<string, mixed>
+     *
+     * @throws ValidationException
+     */
+    public function validated(): array
+    {
+        return $this->validate($this->rules(), $this->messages(), $this->attributes());
+    }
+
     public function user(?string $guard = null): ?Authenticatable
     {
         $auth = Container::getInstance()->make('auth');

tests/Feature/CustomRequestValidationTest.php

@@ -0,0 +1,71 @@
+<?php
+
+use Laravel\Mcp\Request;
+use Laravel\Mcp\Server;
+use Laravel\Mcp\Server\Tool;
+
+class GreetingRequest extends Request
+{
+    public function rules(): array
+    {
+        return [
+            'name' => 'required|string',
+        ];
+    }
+
+    public function messages(): array
+    {
+        return [
+            'name.required' => 'The :attribute field is required.',
+            'name.string' => 'The :attribute must be a string.',
+        ];
+    }
+
+    public function attributes(): array
+    {
+        return [
+            'name' => 'Name',
+        ];
+    }
+}
+
+class GreetingServer extends Server
+{
+    protected array $tools = [
+        Greet::class,
+    ];
+}
+
+class Greet extends Tool
+{
+    public function handle(GreetingRequest $request): string
+    {
+        $validated = $request->validated();
+        $name = $validated['name'];
+
+        return "Hello, {$name}!";
+    }
+}
+
+it('returns empty arrays for default validation helpers', function (): void {
+    $request = new Request;
+
+    expect($request->rules())->toBe([]);
+    expect($request->messages())->toBe([]);
+    expect($request->attributes())->toBe([]);
+    expect($request->validated())->toBe([]);
+});
+
+it('can use the custom request validation', function (): void {
+    $response = GreetingServer::tool(Greet::class, [
+        'name' => 'World',
+    ]);
+
+    $response->assertSee('Hello, World!');
+});
+
+it('can throw validation errors when required fields are missing', function (): void {
+    $response = GreetingServer::tool(Greet::class, []);
+
+    $response->assertHasErrors(['name' => 'The Name field is required.']);
+});