[Bug] Unable to configure Custom Agents in Eclipse – "This setting is disabled by your organization"

Environment

• OS: Windows 11
• Eclipse Version: Spring Tools for Eclipse (STS) 5.2.0.RELEASE
• Plugin Version: 0.18.0

Describe the bug
The Custom Agents preference page is disabled in Eclipse/STS and displays the message:

"This setting is disabled by your organization."

I am unable to create or manage custom agents from Eclipse, even though I am signed in with a valid GitHub Copilot Business account.

The same GitHub account is able to access Copilot features in other supported IDEs.

To Reproduce
Steps to reproduce the behavior:
Open Eclipse / Spring Tools for Eclipse.
Navigate to Window → Preferences → GitHub Copilot → Custom Agents.
Observe the Custom Agents page.

Expected behavior
The Custom Agents page should allow users to configure and manage custom agents (stored as .agent.md files in .github/agents) when the feature is available for the signed-in GitHub account.

Actual behavior
The page displays the message:
"This setting is disabled by your organization."
No options are available to create, manage, or configure custom agents.

Screenshots

Additional context
Signed in using a GitHub Copilot Business account.
The issue occurs consistently after restarting Eclipse and re-authenticating.
GitHub Copilot Chat and other Copilot features appear to function normally.
It is unclear whether this is an Eclipse plugin issue, a missing feature entitlement check, or an organization policy being interpreted differently than in other IDEs.

Reproduce the issue in Spring Tools for Eclipse 5.2.0.RELEASE with plugin 0.18.0 by opening Window → Preferences → GitHub Copilot → Custom Agents. Compare the organization-policy message with the signed-in Copilot Business account's access in another IDE, then trace the Eclipse plugin's entitlement and preference-page handling. Done means eligible users can manage .agent.md custom agents while genuinely restricted accounts remain correctly disabled.