Whether a JSON Schema type value is one the draft permits an x-mcp-header
annotation to be applied to. Per server/tools #x-mcp-header, only the
primitive types integer, string, and boolean are allowed; number is
explicitly NOT permitted (its value may not round-trip through a header).
Whether a JSON Schema type value is one the draft permits an x-mcp-header annotation to be applied to. Per server/tools #x-mcp-header, only the primitive types integer, string, and boolean are allowed; number is explicitly NOT permitted (its value may not round-trip through a header).