What rules is it for calling a third-plugin by Chatgpt

Accroding to the documents related Plugins, I find the following :
"We start by defining the specification version, the title, description, and version number. When a query is run in ChatGPT, it will look at the description that is defined in the info section to determine if the plugin is relevant for the user query. "
So, I have 2 questions,

  1. If there are two plugins with basically the same description, how can chatgpt determine which one to call?
  2. If I have a plugin that wants the user to input a special prompt to get the features and capabilities of the plugin, can the Chatgpt UI present it to the user?