Improve simple attributes documentation (#3154)

Author: mullermp

gems/aws-sdk-dynamodb/CHANGELOG.md

@@ -1,6 +1,8 @@
 Unreleased Changes
 ------------------
 
+* Issue - Improve `SimpleAttributes` documentation.
+
 1.131.0 (2024-12-03)
 ------------------
 

gems/aws-sdk-dynamodb/lib/aws-sdk-dynamodb/plugins/simple_attributes.rb

@@ -13,6 +13,30 @@ module Plugins
       #
       #     ddb = Aws::DynamoDB::Client.new(simple_attributes: false)
       #
+      # Members are marshalled using the following objects:
+      #
+      # * `Hash` or `#to_h` => `:m`
+      # * `Array` => `:l`
+      # * `String` or `Symbol` or `#to_str` => `:s`
+      # * `Numeric` => `:n`
+      # * `StringIO` or `IO` => `:b`
+      # * `Set<Object>` => `:ss` or `:ns` or `:bs`
+      # * `true` or `false` => `:bool`
+      # * `nil` => `:null`
+      #
+      # Members are unmarshalled into the following objects:
+      #
+      # * `:m` => `Hash`
+      # * `:l` => `Array`
+      # * `:s` => `String`
+      # * `:n` => `BigDecimal`
+      # * `:b` => `StringIO`
+      # * `:null` => `nil`
+      # * `:bool` => `true` or `false`
+      # * `:ss` => `Set<String>`
+      # * `:ns` => `Set<BigDecimal>`
+      # * `:bs` => `Set<StringIO>`
+      #
       # ## Input Examples
       #
       # With this plugin **enabled**, `simple_attributes: true`:
@@ -101,6 +125,8 @@ class SimpleAttributes < Seahorse::Client::Plugin
 Disabling this option requires that all attribute values have
 their types specified, e.g. `{ s: 'abc' }` instead of simply
 `'abc'`.
+
+See {Aws::DynamoDB::Plugins::SimpleAttributes} for more information.
         DOCS
         ) do |config|
           !config.simple_json