From the forum (http://www.hitmanforum.com/t/elusive-target-no-17-the-food-critic-12-29-2016-29-12-2016/13412)

Good evening, 47.

Your target is Wen Ts’ai, the highly influential Southeast Asian food critic. His brutal attention to detail and relentless criticism of the smallest errors are notorious in restaurants across the Pacific Rim. He thinks nothing of basing a career-destroying review over an overchilled bottle of Kona Nigari.

We expect him at Restaurant Miam in Bangkok where his refusal to actually swallow any of the food he tastes may prove a challenge.

The clock is ticking, 47. Good luck.

Emphasis mine, seems to rule out poisoning.