YOU SAID:

my fingers are poised at the keys

INTO JAPANESE

私の指は鍵で準備されている

BACK INTO ENGLISH

My fingers are prepared with the key.

INTO JAPANESE

私の指は鍵で準備されています。

BACK INTO ENGLISH

My fingers are prepared with a key.

INTO JAPANESE

私の指は鍵で準備されています。

BACK INTO ENGLISH

My fingers are prepared with a key.