add titles to tools, prompts and resources

lib/mcp/tool.rb

@@ -5,6 +5,7 @@ module MCP
     class << self
       NOT_SET = Object.new
 
+      attr_reader :title_value
       attr_reader :description_value
       attr_reader :annotations_value
 
@@ -15,6 +16,7 @@ module MCP
       def to_h
         result = {
           name: name_value,
+          title: title_value,
           description: description_value,
           inputSchema: input_schema_value.to_h,
         }
@@ -25,6 +27,7 @@ module MCP
       def inherited(subclass)
         super
         subclass.instance_variable_set(:@name_value, nil)
+        subclass.instance_variable_set(:@title_value, nil)
         subclass.instance_variable_set(:@description_value, nil)
         subclass.instance_variable_set(:@input_schema_value, nil)
         subclass.instance_variable_set(:@annotations_value, nil)
@@ -46,6 +49,14 @@ module MCP
         @input_schema_value || InputSchema.new
       end
 
+      def title(value = NOT_SET)
+        if value == NOT_SET
+          @title_value
+        else
+          @title_value = value
+        end
+      end
+
       def description(value = NOT_SET)
         if value == NOT_SET
           @description_value
@@ -74,9 +85,10 @@ module MCP
         end
       end
 
-      def define(name: nil, description: nil, input_schema: nil, annotations: nil, &block)
+      def define(name: nil, title: nil, description: nil, input_schema: nil, annotations: nil, &block)
         Class.new(self) do
           tool_name name
+          title title
           description description
           input_schema input_schema
           self.annotations(annotations) if annotations