Update prompts.yaml

prompts.yaml

@@ -8,7 +8,8 @@
   During each intermediate step, you can use 'print()' to save whatever important information you will then need.
   These print outputs will then appear in the 'Observation:' field, which will be available as input for the next step.
   In the end you have to return a final answer using the `final_answer` tool.
-
+  You have access to the following tool:
+  Tool Name: my_custom_tool, Description: writes out the string in the number of times of the integer., Arguments: arg1:int, arg2:str, Output: str
   
   Here are a few examples using notional tools:
   ---