Router Query Engine Question

[gmdl007]

This config i find in the example for Router Query Engine, and the description is kind of the text which lead you to decide which tool to router route to. But in this context, what i have written below, does it make sense? I find somethings the tool was making a wrong decision, is it because my description is not extensive enough?

from llama_index.core.tools import QueryEngineTool

list_tool = QueryEngineTool.from_defaults(
query_engine=list_query_engine,
description=(
"Useful for summarization task"
),
)

vector_tool = QueryEngineTool.from_defaults(
query_engine=vector_query_engine,
description=(
"Useful for retrieving specific information task"
),
)

Original:

from llama_index.core.tools import QueryEngineTool

list_tool = QueryEngineTool.from_defaults(
query_engine=list_query_engine,
description=(
"Useful for summarization questions related to Paul Graham eassy on"
" What I Worked On."
),
)

vector_tool = QueryEngineTool.from_defaults(
query_engine=vector_query_engine,
description=(
"Useful for retrieving specific context from Paul Graham essay on What"
" I Worked On."
),
)

to be honest, i didnt understand why the text is seperated into 2 parts...

Cheers
Guan