Add example: Handling large tool call results

[arronbailiss]

Summary

Add a working sample demonstrating how to handle large (multi-megabyte) tool outputs without polluting agent context.

Related: strands-agents/harness-sdk#2597

Suggested location

02-samples/large-tool-output-handling/

What to include

• File reference pattern: tool writes to /tmp, returns path string
• AfterToolCallEvent hook to truncate large results
• Wrapper tool example (pipeline chaining)
• README with pattern tradeoffs and when to use each

Motivation

A common real-world challenge for agents dealing with APIs or databases returning large payloads.

References

• Hooks docs: https://strandsagents.com/docs/user-guide/concepts/agents/hooks/