Mikyo I don't think I'll open a new issue since there is already a similar one. I want to track the costs of my agentic application (with adk), most of the costs are LLM costs which are already handled, but sometimes, the tools do stuff that incurs additional costs (image generation for example), and I want to track them in the cumulative cost of the trace. Currently I just add a new attribute cost in the span of the tool, but it isn't taken into account in the total sum.
