Providing an in property for parameters gets explicit about whether a parameter is in the path, query, or a header, making it clear to consumers where they can configure their request
OpenAPI Components Parameters In Error
Message: Parameters In Property MUST Be Set
Policies
Parameter In Query or Path
Specifying whether a parameter goes in the query string, path, or header seems basic, but getting it wrong causes real confusion. This needs to be explicit and correct.
Centralizing Parameters Using Components
Centralizing parameters in OpenAPI components is how you stop repeating yourself. Define a parameter once, reference it everywhere, and governance gets simpler.