Wait for spotlight to index files

Hello,
i'm copying the photos over the network to Hazel folder on different mac.
My rules use the exif info which i belive Hazel takes from spotlight metadata.
The problem is that hazel process the files before they are indexed by spotlight so my files are incorrectly renamed/processed
is there anything to tell Hazel to check if the file is already indexed ? or another way to slow down
thanks,
i'm copying the photos over the network to Hazel folder on different mac.
My rules use the exif info which i belive Hazel takes from spotlight metadata.
The problem is that hazel process the files before they are indexed by spotlight so my files are incorrectly renamed/processed
is there anything to tell Hazel to check if the file is already indexed ? or another way to slow down

thanks,