[Closed Network Mode] Support AgentCore use case.

[tbrand]

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Please make the Issue title as descriptive as possible at a glance.

• Not Good: About xxx => Good: Feature request to do yyy with xxx
• Not Good: Improvement request for xxx => Good: Want to be able to do yyy with xxx

[github-actions]

This issue is stale because it has been open for 30 days with no activity.

[github-actions]

This issue was closed because it has been inactive for 14 days since being marked as stale.