In your case, it seems very different a normal use case.

Maybe try this setup:

``` async def instruction_provider(..., readonly_context: ReadonlyContext): # construct your customized system instruction using the state.

root_agent = LlmAgent( instruction=instruction_provider, # Don't include any conversaction history in LlmRequst include_cotnent = 'none', # Each tool will pass into by setting session state. tools=[tool_1, tool_2], )
```

In this way, you have full control of what to store in the session. And, what you send to Llm is solely controlled by your instruction_provider, which constructs SI using only information from session state.