Add tool name validation for SEP-986 (#140)

tests/Unit/Capability/Registry/RegistryTest.php

@@ -140,7 +140,7 @@ class RegistryTest extends TestCase
         $this->logger
             ->expects($this->once())
             ->method('debug')
-            ->with("Ignoring discovered tool 'test_tool' as it conflicts with a manually registered one.");
+            ->with('Ignoring discovered tool "test_tool" as it conflicts with a manually registered one.');
 
         $this->registry->registerTool($discoveredTool, fn () => 'discovered', false);
 
@@ -181,7 +181,7 @@ class RegistryTest extends TestCase
         $this->logger
             ->expects($this->once())
             ->method('debug')
-            ->with("Ignoring discovered resource 'test://resource' as it conflicts with a manually registered one.");
+            ->with('Ignoring discovered resource "test://resource" as it conflicts with a manually registered one.');
 
         $this->registry->registerResource($discoveredResource, fn () => 'discovered', false);
 
@@ -210,7 +210,7 @@ class RegistryTest extends TestCase
         $this->logger
             ->expects($this->once())
             ->method('debug')
-            ->with("Ignoring discovered template 'test://{id}' as it conflicts with a manually registered one.");
+            ->with('Ignoring discovered template "test://{id}" as it conflicts with a manually registered one.');
 
         $this->registry->registerResourceTemplate($discoveredTemplate, fn () => 'discovered', [], false);
 
@@ -239,7 +239,7 @@ class RegistryTest extends TestCase
         $this->logger
             ->expects($this->once())
             ->method('debug')
-            ->with("Ignoring discovered prompt 'test_prompt' as it conflicts with a manually registered one.");
+            ->with('Ignoring discovered prompt "test_prompt" as it conflicts with a manually registered one.');
 
         $this->registry->registerPrompt($discoveredPrompt, fn () => 'discovered', [], false);
 

tests/Unit/Capability/Tool/NameValidatorTest.php

@@ -0,0 +1,56 @@
+<?php
+
+/*
+ * This file is part of the official PHP MCP SDK.
+ *
+ * A collaboration between Symfony and the PHP Foundation.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Mcp\Tests\Unit\Capability\Tool;
+
+use Mcp\Capability\Tool\NameValidator;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\TestCase;
+
+final class NameValidatorTest extends TestCase
+{
+    #[DataProvider('provideValidNames')]
+    public function testValidNames(string $name): void
+    {
+        $this->assertTrue((new NameValidator())->isValid($name));
+    }
+
+    public static function provideValidNames(): array
+    {
+        return [
+            ['my_tool'],
+            ['MyTool123'],
+            ['my.tool'],
+            ['my-tool'],
+            ['my/tool'],
+            ['my_tool-01.02'],
+            ['my_long_toolname_that_is_exactly_sixty_four_characters_long_1234'],
+        ];
+    }
+
+    #[DataProvider('provideInvalidNames')]
+    public function testInvalidNames(string $name): void
+    {
+        $this->assertFalse((new NameValidator())->isValid($name));
+    }
+
+    public static function provideInvalidNames(): array
+    {
+        return [
+            [''],
+            ['my tool'],
+            ['my@tool'],
+            ['my!tool'],
+            ['my_tool#1'],
+            ['this_tool_name_is_way_too_long_because_it_exceeds_the_sixty_four_character_limit_set_by_the_validator'],
+        ];
+    }
+}