See stewardship in the Glossary, defined as

the relationship between an AgentSpace and the Holons it is responsible for.

If we make a clearer distinction between and AgentSpace and the Agent that is contained in that AgentSpace, we could reframe this as

“the relationship between an Agent and the Holons (i.e. any type of entity, including lower level Agents) in the AgentSpace of that Agent: that is, contained within the membrane of that Agent.