It is often useful, in the context of an extended Conversation, to refer to specific attachments of a Task, Defect, or Backlog Item. To do this, I can write the title of the attachment in my message and Mention the asset to which it is attached, but it would be much faster for both writer and reader if I could mention the attachment directly.

Similarly, perhaps, it would be useful to be able to search for attachments by their title or by the title of the asset to which they are attached, or from a different perspective, to have the option of seeing attachment links in the search results for an asset.