01 / DECIDE
Architecture decision
Use it when the model needs private data or a bounded action beyond text generation.
Let the model request a call while authenticated application code validates arguments, executes, and returns a typed result. Map input, output, state, tools, and side effects as one observable path, then name the owner of give custom functions a narrow schema.
02 / OPERATE
Three-step field procedure
- 01
Lock the contract
Write down the caller, data classification, success condition, timeout, cancellation, and ownership. Use it when the model needs private data or a bounded action beyond text generation.
- 02
Run one bounded path
Build one end-to-end path with correlation, typed state, and reversible failure handling. Let the model request a call while authenticated application code validates arguments, executes, and returns a typed result.
- 03
Verify the signal
Turn acceptance into a repeatable fixture, contract test, or browser test. Replay tests prove duplicate calls are safe and every error branch is typed.
03 / BOUND
Operational boundary
Credentials never belong in arguments; high-impact writes need approval and idempotency.
04 / PROVE
Acceptance evidence
Replay tests prove duplicate calls are safe and every error branch is typed.
SOURCE / HTTP
Reproducible source probe
curl -fsSI 'https://docs.x.ai/developers/tools/function-calling' | sed -n '1,5p'