The feature you're describing is called "tool calling" in harness parlance. It's...

bigyabai 42 days ago | parent | context | favorite | on: Ask HN: What happens when Claude Code goes away?

The feature you're describing is called "tool calling" in harness parlance. It's not Anthropic-exclusive, it's probably broken on your local models because you misconfigured Ollama (or it misconfigured itself; Ollama isn't a great inference server).