T5-R2 ecosystem
Tool: A function the loop may call, with a schema and a known effect.
Workflows
State machines
Function calling
The same loop can sit behind chat or a voice turn. The channel does not remove the cap.
MCP is one way to plug tools into that loop. It is the next track.
Write the goal in one sentence.
Name the input and the allowed output.
Save the trace next to the result.
The answer looks fluent and is wrong. Check whether a source passage actually contains the claim.
The loop never stops. Set a step cap and stop when the tool result repeats.
Sources and go deeper
- Schick and co-authors, Toolformer: Language Models Can Teach Themselves to Use Tools, 2023 paper last checked 2026-10
- Anthropic, Building effective agents vendor last checked 2026-10
- Large language model — Wikipedia wikipedia last checked 2026-10