spec complicance 2025-06-18

Author: topherbullock

lib/mcp/prompt.rb

@@ -8,13 +8,20 @@ class << self
       attr_reader :title_value
       attr_reader :description_value
       attr_reader :arguments_value
+      attr_reader :meta_value
 
       def template(args, server_context: nil)
         raise NotImplementedError, "Subclasses must implement template"
       end
 
       def to_h
-        { name: name_value, title: title_value, description: description_value, arguments: arguments_value.map(&:to_h) }.compact
+        {
+          name: name_value,
+          title: title_value,
+          description: description_value,
+          arguments: arguments_value&.map(&:to_h),
+          _meta: meta_value
+        }.compact
       end
 
       def inherited(subclass)
@@ -23,6 +30,7 @@ def inherited(subclass)
         subclass.instance_variable_set(:@title_value, nil)
         subclass.instance_variable_set(:@description_value, nil)
         subclass.instance_variable_set(:@arguments_value, nil)
+        subclass.instance_variable_set(:@meta_value, nil)
       end
 
       def prompt_name(value = NOT_SET)
@@ -61,6 +69,14 @@ def arguments(value = NOT_SET)
         end
       end
 
+      def meta(value = NOT_SET)
+        if value == NOT_SET
+          @meta_value
+        else
+          @meta_value = value
+        end
+      end
+
       def define(name: nil, title: nil, description: nil, arguments: [], &block)
         Class.new(self) do
           prompt_name name

lib/mcp/prompt/argument.rb

@@ -3,17 +3,22 @@
 module MCP
   class Prompt
     class Argument
-      attr_reader :name, :description, :required, :arguments
+      attr_reader :name, :title, :description, :required
 
-      def initialize(name:, description: nil, required: false)
+      def initialize(name:, title: nil, description: nil, required: false)
         @name = name
+        @title = title
         @description = description
         @required = required
-        @arguments = arguments
       end
 
       def to_h
-        { name:, description:, required: }.compact
+        {
+          name: name,
+          title: title,
+          description: description,
+          required: required
+        }.compact
       end
     end
   end

lib/mcp/resource.rb

@@ -2,23 +2,29 @@
 
 module MCP
   class Resource
-    attr_reader :uri, :name, :title, :description, :mime_type
+    attr_reader :name, :title, :uri, :description, :mime_type, :annotations, :size, :meta
 
-    def initialize(uri:, name:, title: nil, description: nil, mime_type: nil)
-      @uri = uri
+    def initialize(uri:, name:, title: nil, description: nil, mime_type: nil, annotations: nil, size: nil, meta: {})
       @name = name
       @title = title
+      @uri = uri
       @description = description
       @mime_type = mime_type
+      @annotations = annotations
+      @size = size
+      @meta = meta
     end
 
     def to_h
       {
-        uri: uri,
         name: name,
         title: title,
+        uri: uri,
         description: description,
         mimeType: mime_type,
+        annotations: annotations&.to_h,
+        size: size,
+        _meta: meta
       }.compact
     end
   end

lib/mcp/resource_template.rb

@@ -2,23 +2,27 @@
 
 module MCP
   class ResourceTemplate
-    attr_reader :uri_template, :name, :title, :description, :mime_type
+    attr_reader :name, :title, :uri_template, :description, :mime_type, :annotations, :meta
 
-    def initialize(uri_template:, name:, title: nil, description: nil, mime_type: nil)
-      @uri_template = uri_template
+    def initialize(uri_template:, name:, title: nil, description: nil, mime_type: nil, annotations: nil, meta: nil)
       @name = name
       @title = title
+      @uri_template = uri_template
       @description = description
       @mime_type = mime_type
+      @annotations = annotations
+      @meta = meta || {}
     end
 
     def to_h
       {
-        uriTemplate: uri_template,
         name: name,
         title: title,
+        uriTemplate: uri_template,
         description: description,
         mimeType: mime_type,
+        annotations: annotations&.to_h,
+        _meta: meta.empty? ? nil : meta
       }.compact
     end
   end

lib/mcp/tool.rb

@@ -8,6 +8,7 @@ class << self
       attr_reader :title_value
       attr_reader :description_value
       attr_reader :annotations_value
+      attr_reader :meta_value
 
       def call(*args, server_context: nil)
         raise NotImplementedError, "Subclasses must implement call"
@@ -21,6 +22,7 @@ def to_h
           inputSchema: input_schema_value.to_h,
           outputSchema: @output_schema_value&.to_h,
           annotations: annotations_value&.to_h,
+          _meta: meta_value
         }.compact
       end
 
@@ -32,6 +34,7 @@ def inherited(subclass)
         subclass.instance_variable_set(:@input_schema_value, nil)
         subclass.instance_variable_set(:@output_schema_value, nil)
         subclass.instance_variable_set(:@annotations_value, nil)
+        subclass.instance_variable_set(:@meta_value, nil)
       end
 
       def tool_name(value = NOT_SET)
@@ -100,6 +103,14 @@ def annotations(hash = NOT_SET)
         end
       end
 
+      def meta(value = NOT_SET)
+        if value == NOT_SET
+          @meta_value
+        else
+          @meta_value = value
+        end
+      end
+
       def define(name: nil, title: nil, description: nil, input_schema: nil, output_schema: nil, annotations: nil, &block)
         Class.new(self) do
           tool_name name