All agents are classified by their level
and quality. Agent quality ranges from -20 to 20. The base agent quality is modified by the agent's standing towards you and any levels you may have in the negotiation skill
to give an effective quality
. This effective quality affects the rewards given to you for succesfully completing an agent mission
. The higher the effective quality, the better the rewards.
Read more in the guide on agent level and quality
Current EVE version
: 2.08.3582 (Exodus)