Existing agent tools.
Agents
Three tabs
Catalog lists starter tools. Saved agents are reusable extraction configurations with a schema and a bound source. Knowledge assistants are session assistants over a collection. Switching tabs does not run anything.
Launch a tool
Open a starter, such as Semantic Search, and choose an authorized collection. The tool screen says analysis stays in the session and does not create a saved agent or run history. A saved agent still needs agent:run and an indexed collection before it returns a grounded result.
What is not a result
New extraction agent saves a configuration. No visible run history means the agent has not executed. Do not treat that card as a completed answer.