implement: 1. A tool or instrument used in doing work; 3. A means of achieving an end.
American Heritage® Dictionary of the English Language, Fourth Edition
manual: 1. (a) Of or relating to the hands; (b) Done by, used by, or operated with the hands.
American Heritage® Dictionary of the English Language, Fourth Edition
What could possibly have made you think that your hands weren't included?
1. As I said, it was not a "test case" it was an exploration of the boundaries of your definiton.
2. If you re-read the definitions you quoted you will see that the phrase "manual implement" appears redundant if, in your usage, a manual implement can include just hands.