README.md: admin team responsibilities and quorum

README.md

@@ -55,15 +55,33 @@ As PRs from forks don't have automatic CI checks, admins can test PRs by posting
 
 ### nix-community administrators
 
-* @adisbladis
-* @flokli
-* @grahamc
 * @Mic92
-* @nlewo
+* @adisbladis
 * @ryantm
 * @zimbatm
 * @zowoq
 
+#### Role
+
+The role of the administrators is to support the members of the org, and the Nix project in general.
+
+#### Responsibilities
+
+The administrators are responsible for serving the community to the best of their ability and availability.
+
+They provide services such as:
+* keep the systems updated and patched
+* reply to user requests
+* host new services that could help the project
+* on-board new projects
+* resolve conflict
+
+The administrators are the only "owners" of the github organization.
+
+#### Quorum of 5 rule
+
+To reduce the attack surface on the project, the administrative team size is limited to 5 people.
+
 ## Hosts
 
 See [HOSTS.md](HOSTS.md), this file also contains deployment details.