In SERVER-100394, we overrode the default DocumentSource::getDependencies() for mongot stages, just for the sake of error reporting in $meta validation. (For example, since $search populates the "searchScore" meta field, we know that downstream stages can access "searchScore" but not "vectorSearchScore").

We did not implement the actual core logic of getDependencies() for pipeline analysis (potentially used for optimizations). We may want to actually implement and test dependency analysis for mongot pipelines.