Update IndexMappingTool Description

[dbwiddis]

Description

Updates the description of the IndexMappingTool to include the expected output format. This improves LLM performance in understanding the tool output.

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (bfebdd8) 82.84% compared to head (801c07e) 82.87%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1982      +/-   ##
============================================
+ Coverage     82.84%   82.87%   +0.03%     
- Complexity     5505     5510       +5     
============================================
  Files           533      533              
  Lines         22098    22104       +6     
  Branches       2244     2244              
============================================
+ Hits          18306    18319      +13     
+ Misses         2876     2870       -6     
+ Partials        916      915       -1     

Flag	Coverage Δ
ml-commons	82.87% <ø> (+0.03%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.