Clarify which agent the Tools customization page applies to

The **Agent Customizations > Tools** page does not indicate which agent its tool configuration applies to. It is unclear whether the listed tools are for the default agent or for the partner agent currently selected in the chat picker.

The equivalent Harness customization reflects the selected harness, so I expected agent tool customization to behave the same way.

**Expected**

The page should clearly identify the agent whose tools are being configured and, if applicable, update when the selected agent changes.

Start at the Agent Customizations > Tools page and trace how the selected agent from the chat picker is represented, comparing it with the equivalent Harness customization. Confirm which agent currently supplies the listed tools, then make the page identify that agent and update when the selection changes; verify both the default and partner-agent cases.

Written by the indexing model from the issue text.