The plain-English version
A machine-readable description of the arguments a callable operation accepts.
Why it matters
It reduces ambiguity at the boundary between a model's proposed action and application code.
Let’s make it click
A calendar lookup tool accepts a start date, end date, and time zone.
Vibe Bro’s heads-up
Well-shaped arguments can still request an unauthorized action; validate values and permissions inside the trusted tool implementation.
The docs behind it
Documentation links checked .
Editorial review · October 28, 2026
Supported: Schema shape and operation authorization are correctly separated; valid arguments do not grant permission.