Base64 handoff: state how to decode the payload

When passing a Base64 value to another team, include the source format, character encoding, Base64 variant, padding rule, and expected decoded size. If it represents JSON, an image, or a file, say so and validate that content separately after decoding. Do not place secrets in a handoff merely because they are encoded; Base64 is reversible. A sample decode command or known checksum can help the recipient verify that transport did not alter the bytes.