use meta naming for _meta field on tool schema

Author: topherbullock

lib/mcp/server.rb

@@ -99,8 +99,8 @@ def handle_json(request)
       end
     end
 
-    def define_tool(name: nil, title: nil, description: nil, input_schema: nil, annotations: nil, metadata: nil, &block)
-      tool = Tool.define(name:, title:, description:, input_schema:, annotations:, metadata:, &block)
+    def define_tool(name: nil, title: nil, description: nil, input_schema: nil, annotations: nil, meta: nil, &block)
+      tool = Tool.define(name:, title:, description:, input_schema:, annotations:, meta:, &block)
       @tools[tool.name_value] = tool
     end
 

lib/mcp/tool.rb

@@ -8,7 +8,7 @@ class << self
       attr_reader :title_value
       attr_reader :description_value
       attr_reader :annotations_value
-      attr_reader :metadata_value
+      attr_reader :meta_value
 
       def call(*args, server_context: nil)
         raise NotImplementedError, "Subclasses must implement call"
@@ -21,7 +21,7 @@ def to_h
           description: description_value,
           inputSchema: input_schema_value.to_h,
         }
-        result[:_meta] = metadata_value if metadata_value
+        result[:_meta] = meta_value if meta_value
         result[:annotations] = annotations_value.to_h if annotations_value
         result
       end
@@ -33,7 +33,7 @@ def inherited(subclass)
         subclass.instance_variable_set(:@description_value, nil)
         subclass.instance_variable_set(:@input_schema_value, nil)
         subclass.instance_variable_set(:@annotations_value, nil)
-        subclass.instance_variable_set(:@metadata_value, nil)
+        subclass.instance_variable_set(:@meta_value, nil)
       end
 
       def tool_name(value = NOT_SET)
@@ -80,11 +80,11 @@ def input_schema(value = NOT_SET)
         end
       end
 
-      def metadata(value = NOT_SET)
+      def meta(value = NOT_SET)
         if value == NOT_SET
-          @metadata_value
+          @meta_value
         else
-          @metadata_value = value
+          @meta_value = value
         end
       end
 
@@ -96,7 +96,7 @@ def annotations(hash = NOT_SET)
         end
       end
 
-      def define(name: nil, title: nil, description: nil, input_schema: nil, metadata: nil, annotations: nil, &block)
+      def define(name: nil, title: nil, description: nil, input_schema: nil, meta: nil, annotations: nil, &block)
         Class.new(self) do
           tool_name name
           title title