Your task takes place in the current working directory.

You are processing the output of a long-running diagnostic tool. The output is in tool_output.txt. Somewhere inside the output there is a line of the form API_RATE_LIMIT=<value>. Find that value and report it back to the user.

You may create scratch files if helpful. When you have the answer, respond with a short message that includes the exact line API_RATE_LIMIT=<value> and nothing else important.

Do not modify tool_output.txt.