FA-99750 / Tool call schema validation / Member archive

Pattern-matched properties are rejected as unknown extras · case 05

Pattern-matched properties are rejected as unknown extras.

Member previewVariant 5 · 3 implementations · 7 checks per implementation

Case contract

An object field is valid if its name is explicitly declared, or if one or more prefix pattern rules match and its value belongs to every matching rule set. Unmatched extras are invalid.

Why this case matters

Tool argument validation prevents malformed structured payloads from entering a deterministic downstream operation.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
valid patterned property	`false`	`true`	Failed

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