Reducing AI token usage with category filtering

I aspire to engage the bot in interrogation, ensuring it exclusively considers posts from a specific category. My objective is to curtail the utilization of AI tokens and retrieve information solely from a designated category of posts. How might I achieve this?

p.s. I’m using official AI plugin

When your agent uses the default “Search” tool, the Agent Edit form will present this

Limiting it to a specific category is even the example we use on the form help text.