[Bamboo Knowledge Base]
Capabilities typically define the path to an executable that has already been installed, and must be defined in Bamboo before Bamboo or its agents can make use of those.
Capabilities can be defined specifically for an agent, or they can be shared between either all local agents or all remote agents. Note that the value of an agent-specific capability overrides the value of a shared capability of the same name (if one exists).
See Configuring capabilities for more information.