Update services/pipeline_executor.py

services/pipeline_executor.py

@@ -146,9 +146,11 @@ Action Input: {{"param1": "value1", "param2": value2}}
 After you write Action and Action Input, I will execute the tool and give you the Observation.
 Then you can take another Action or provide your Final Answer.
 
-CRITICAL:
+CRITICAL RULES:
 - Write "Action:" followed by the tool name
 - Write "Action Input:" followed by valid JSON on the SAME line or next line
+- For page parameters: start_page must be >= 1, end_page must be >= 1
+- To process ALL pages, use end_page: 999 (NOT -1!)
 - After seeing Observation, you can take another Action
 - When done, write "Final Answer:" followed by summary