This is the job of the space agencies' planetary protection officers: https://sma.nasa.gov/sma-disciplines/planetary-protection https://sma.nasa.gov/sma-discip

This is the job of the space agencies' planetary protection officers: https://sma.nasa.gov/sma-disciplines/planetary-protection https://sma.nasa.gov/sma-disciplines/planetary-protection https://www.esa.int/Science_Exploration/Human_and_Robotic_Exploration/Exploration/Planetary_protection https://www.esa.int/Science_Exploration/Human_and_Robotic_Ex... There's a handbook and everything: https://ec.europa.eu/research/participants/documents/downloadPublic/NHY0a2o4bVRJQWhPQkpRajBuRWNXWTgxdS9RWEFXdXJBUzVVeDA1WXYzbXpBeGJ5dWZyd3N3PT0=/attachment/VFEyQTQ4M3ptUWRBd1IwZnoramRydVNQZlNYQUplalA= https://ec.europa.eu/research/participants/documents/downloa...