"Agilidad" and "agility" are not necessarily false friends, especially in this context. The RAE defines "agilizar" as: "hacer agil, dar rapidez **y facilidad** al desarrollo de un proceso o a la realizacion de una cosa."

"Agility" in English can be "quickness and dexterity of movement; ... quickness and resourcefulness of mind" (Webster's International III).

Examples:

... Transport Identities to allow agility of stack location. Host identities to
allow agility of location of all hosted sessions ...
www.potaroo.net/presentations/ 2004-09-23-who-are-you.ppt

... No Band - constructed without a band to allow agility in rotational and
multi-access applications. Riveted - constructed with stainless steel band ...
www.gortrac.com/gortube.htm

... Today’s bureaucracy does not allow agility. • Encourage cooperation among
Service Staffs and. Secretariats (GC, LA, PA offices) ...
www.dtic.mil/ndia/2001systems/fowler.pdf

... We provide tools that allow agility and flexibility in software development
and because of this we can help maintain an acceptable degree of budget and ...
www.openspirit.com/Newsletter/ news_summer04_feature.html