Update agent.py

agent.py

@@ -87,7 +87,7 @@ class AgentTools:
                 }
             ],
             n_sentences_before = 2, n_sentences_after = 2, lambda_val = 0.005,
-            summary_num_results = 10,
+            summary_num_results = 5,
             vectara_summarizer = summarizer,
             include_citations = False,
         )