Support Sorbet typed tools

test/model_context_protocol/tool_test.rb

@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "test_helper"
@@ -203,5 +204,34 @@ module ModelContextProtocol
       tool.annotations(title: "Updated")
       assert_equal tool.annotations_value.title, "Updated"
     end
+
+    test "#call with Sorbet typed tools invokes the tool block and returns the response" do
+      class TypedTestTool < Tool
+        tool_name "test_tool"
+        description "a test tool for testing"
+        input_schema({ properties: { message: { type: "string" } }, required: ["message"] })
+        annotations(
+          title: "Test Tool",
+          read_only_hint: true,
+          destructive_hint: false,
+          idempotent_hint: true,
+          open_world_hint: false,
+        )
+
+        class << self
+          extend T::Sig
+
+          sig { params(message: String, server_context: T.nilable(T.untyped)).returns(Tool::Response) }
+          def call(message, server_context: nil)
+            Tool::Response.new([{ type: "text", content: "OK" }])
+          end
+        end
+      end
+
+      tool = TypedTestTool
+      response = tool.call("test")
+      assert_equal response.content, [{ type: "text", content: "OK" }]
+      assert_equal response.is_error, false
+    end
   end
 end