What is the term for an encumbrance on land that restricts its use for community protection?

The term that describes an encumbrance on land which restricts its use for community protection is indeed a restriction. Restrictions are often placed on properties to uphold certain standards or to ensure that the land is used in a way that benefits the community or protects the environment. These can include zoning laws, building codes, or specific prohibitions that limit how the land can be utilized, thereby safeguarding community interests such as safety, aesthetics, or ecological integrity.

Easements are legal rights allowing someone to use a portion of another's property for a specific purpose, but they do not primarily serve as restrictions for community protection. A right of way is a type of easement that grants the right to pass through someone else's property, often for access purposes, rather than addressing community standards or protection. A lease involves renting property and does not pertain to restrictions placed for the benefit of the community at large.

Thus, "restriction" is the appropriate term to describe an encumbrance on land specifically intended for community protection.