Introduce Capability Registry & Discovery

src/Capability/Attribute/McpTool.php

@@ -0,0 +1,33 @@
+<?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\Capability\Attribute;
+
+use Mcp\Schema\ToolAnnotations;
+
+/**
+ * @author Kyrian Obikwelu <koshnawaza@gmail.com>
+ */
+#[\Attribute(\Attribute::TARGET_METHOD | \Attribute::TARGET_CLASS)]
+class McpTool
+{
+    /**
+     * @param string|null          $name        The name of the tool (defaults to the method name)
+     * @param string|null          $description The description of the tool (defaults to the DocBlock/inferred)
+     * @param ToolAnnotations|null $annotations Optional annotations describing tool behavior
+     */
+    public function __construct(
+        public ?string $name = null,
+        public ?string $description = null,
+        public ?ToolAnnotations $annotations = null,
+    ) {
+    }
+}