If provided, enforces the maximum number of results to return, including the "best" result which will always be provided as the SEARCH intent's primary query. Must be one or greater. If not provided, the recognizer will choose how many results to return.

Must be an integer value, such as "100".

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

[Android Documentation]