Agent capabilities are the Agent’s baseline, which is different from Skills. A Skill is a procedure you package for the Agent to reuse; a capability is something the Agent can already do and you only decide whether to allow it.
Open the Agent capabilities panel
1
Open the agent and go to Instructions
On the agent page, tab Build, select Instructions in the left column.
2
Scroll the right Configuration column to the bottom
Look for the Advanced settings group. The Agent capabilities row sits at the very bottom with a counter such as 10/10 showing how many are on.

3
Click Edit
The Agent capabilities dialog opens with the full list, one card per capability with its description and a toggle.

The ten default capabilities
Turn a capability on or off
Flip the toggle on the card and you are done, there is no separate save step. The counter in the dialog header follows along, for example from 10/10 down to 9/10. Click Done to close the dialog. Three capabilities interact with others, so watch out when switching them off:- Virtual file system - write and Code execution / sandbox: Turning off writing alone is not enough, because code running in the sandbox can still write files. Turn off both to block it completely.
- Default sub-agent: Switching this off only removes the platform’s shared sub-agent. Sub-agents you created yourself are not affected.
- Web search: Switching this off does not remove search Connectors you added yourself, they keep working.
Restore defaults
The Restore defaults button in the bottom left of the dialog puts all ten capabilities back to their original state. It only becomes active once you have changed at least one toggle.Changes are versioned
Flipping a toggle only changes the agent’s draft. The agent serving real users keeps running the capability set of the published version until you publish a new one. Each version records its own capability set, so rolling back to an older version brings that version’s capabilities back with it.Default capabilities cannot be added or deleted, only turned on or off. The list of ten is fixed by the platform and identical on every Agent and every Workspace.