There is no frame tool in Illustrator. You can use a clipping mask if you want to crop an image non-destructively. Or, select the image and click the Crop Image button on the Properties panel to remove pixels. To create a clipping mask, select the image and click the mask button on the Properties panel. This creates an invisible rectangle the same size as the image, that will crop the image when you change its size. You can change the size of the clipping mask rectangle in the properties panel. Make sure the edit clipping path button is turned on at the top of the properties panel, then you can change the size numerically in the fields below, or use the selection tool to drag the bounding box handles around the image.