There are three command-line arguments:
Minimum Junos OS Version: 8.2 Latest Script Version: 1.0 MD5 Checksum: 4b830f1cc024657d621d0668e4af092f SHA-256 Checksum: 963dd0f98f7f15d8728343b77d37e07b202362a7c8f682c464600fefeec86787
See the document show-bgp-policy