Internal Release 0.2.0

- fix `lib/mcp-ruby` auto-import path
- implement server resources
- add basic listing of resources to Server
- allow setting handlers on Server
- wrap handler method results
- make tool definition more declarative
- make prompt definition more declarative
- bump dependency versions

test/model_context_protocol/tool_test.rb

@@ -4,19 +4,62 @@ require "test_helper"
 
 module ModelContextProtocol
   class ToolTest < ActiveSupport::TestCase
+    class TestTool < Tool
+      tool_name "test_tool"
+      description "a test tool for testing"
+      input_schema [{ type: "text", name: "message" }]
+
+      def call(message)
+        Tool::Response.new([{ type: "text", content: "OK" }])
+      end
+    end
+
     test "#to_h returns a hash with name, description, and inputSchema" do
       tool = Tool.new(name: "mock_tool", description: "a mock tool for testing")
       assert_equal tool.to_h, { name: "mock_tool", description: "a mock tool for testing", inputSchema: nil }
     end
 
     test "#call invokes the tool block and returns the response" do
-      tool = Tool.new(name: "mock_tool", description: "a mock tool for testing") do |_|
-        Tool::Response.new([{ type: "text", content: "OK" }])
-      end
-
-      response = tool.call
+      tool = TestTool.new
+      response = tool.call("test")
       assert_equal response.content, [{ type: "text", content: "OK" }]
       assert_equal response.is_error, false
     end
+
+    test "allows declarative definition of tools as classes" do
+      class MockTool < Tool
+        tool_name "my_mock_tool"
+        description "a mock tool for testing"
+        input_schema [{ type: "text", name: "message" }]
+      end
+
+      tool = MockTool.new
+      assert_equal tool.name, "my_mock_tool"
+      assert_equal tool.description, "a mock tool for testing"
+      assert_equal tool.input_schema, [{ type: "text", name: "message" }]
+    end
+
+    test "defaults to class name as tool name" do
+      class DefaultNameTool < Tool
+        description "a mock tool for testing"
+        input_schema [{ type: "text", name: "message" }]
+      end
+
+      tool = DefaultNameTool.new
+
+      assert_equal tool.name, "default_name_tool"
+      assert_equal tool.description, "a mock tool for testing"
+      assert_equal tool.input_schema, [{ type: "text", name: "message" }]
+    end
+
+    test ".define allows definition of simple tools with a block" do
+      tool = Tool.define(name: "mock_tool", description: "a mock tool for testing") do |_|
+        Tool::Response.new([{ type: "text", content: "OK" }])
+      end
+
+      assert_equal tool.name, "mock_tool"
+      assert_equal tool.description, "a mock tool for testing"
+      assert_equal tool.input_schema, nil
+    end
   end
 end