add max_observe in toolcall and manus

app/agent/manus.py

@@ -26,6 +26,8 @@ class Manus(ToolCallAgent):
     system_prompt: str = SYSTEM_PROMPT
     next_step_prompt: str = NEXT_STEP_PROMPT
 
+    max_observe: int = 2000
+
     # Add general-purpose tools to the tool collection
     available_tools: ToolCollection = Field(
         default_factory=lambda: ToolCollection(

app/agent/toolcall.py

@@ -1,5 +1,5 @@
 import json
-from typing import Any, List, Literal
+from typing import Any, List, Literal, Optional, Union
 
 from pydantic import Field
 
@@ -31,6 +31,7 @@ class ToolCallAgent(ReActAgent):
     tool_calls: List[ToolCall] = Field(default_factory=list)
 
     max_steps: int = 30
+    max_observe: Optional[Union[int, bool]] = None
 
     async def think(self) -> bool:
         """Process current state and decide next actions using tools"""
@@ -114,6 +115,9 @@ class ToolCallAgent(ReActAgent):
                 f"🎯 Tool '{command.function.name}' completed its mission! Result: {result}"
             )
 
+            if self.max_observe:
+                result = result[: self.max_observe]
+
             # Add tool response to memory
             tool_msg = Message.tool_message(
                 content=result, tool_call_id=command.id, name=command.function.name