Closes #5059

[fbpazos]

In a Magentic Group Settting, if one of the Assitant Agents uses a tool it gives the following error, note this is under a FALSE reflect_on_tool variable.

Making it true, wont happen, though more tokens will be consumed and it will have a worst output and the philosophy of a tool as an answer is not followed...

Why are these changes needed?

Related issue number

Checks

• I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://microsoft.github.io/autogen/docs/Contribute#documentation to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.52%. Comparing base (5e9b24c) to head (c78000a).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5156      +/-   ##
==========================================
+ Coverage   70.50%   70.52%   +0.01%     
==========================================
  Files         174      174              
  Lines       11037    11035       -2     
==========================================
  Hits         7782     7782              
+ Misses       3255     3253       -2     

Flag	Coverage Δ
unittests	70.52% <100.00%> (+0.01%)	⬆️

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