What are directions for the syrup?

The syrup is step 1 in the recipe:
1. Make the cucumber mint syrup: Add agave, water, 2 sprigs of mint, and cucumber to a small saucepan. Cook over medium heat until syrup is infused and reduced, about 10 to 15 minutes. Strain through a fine sieve, transfer to the freezer, and chill for at least 10 minutes.