## Summary
Enhanced `HandoffBuilder._apply_auto_tools` to use the target agent's
description when creating handoff tools, providing more informative tool
descriptions for LLMs.
## Changes
- Modified `_apply_auto_tools` to extract `description` from
`AgentExecutor._agent` when available
- Updated iteration to use `.items()` for more efficient dict traversal
- Handoff tools now use agent descriptions instead of generic placeholders
## Example
Before: "Handoff to the refund_agent agent."
After: "You handle refund requests. Ask for order details and process refunds."
## Testing
- All handoff tests pass (20/20)
- No breaking changes to existing API
Fixes#2713
Co-authored-by: Evan Mattson <35585003+moonbox3@users.noreply.github.com>
