When clicking on the "move comments discussion to chat?" link (under an answer), what actions are triggered :

(a) if the click is by the poster of the answer

(b) if the click is by a commenter in the discussion (not OP or poster of answer)

Do the comments always move automatically whenever anyone offered the option clicks the link, or are there conditions under which the request to move would (or could) be declined? Is clicking the link equivalent to paging a moderator?

I looked on meta.SO but did not find the answers to these questions.

When clicking on the "move comments discussion to chat?" link (under an answer), what actions are triggered :

(a) if the click is by the poster of the answer

(b) if the click is by a commenter in the discussion (not OP or poster of answer)

Do the comments always move automatically whenever anyone offered the option clicks the link, or are there conditions under which the request to move would (or could) be declined? Is clicking the link equivalent to paging a moderator?

I looked on meta.SO but did not find the answers to these questions.

Edit: further search on meta.stackoverflow suggests the comments are not moved, they are copied to a chat. Is this documented anywhere, such as an announcement of the feature when it was new?