A2A Artifact Handoff

Tools

Token cost is the o200k count of the tools list JSON, including schemas, before any tool is called.

• prepare_artifact

  Prepare content for transfer to another agent or a human reviewer. `target_modes` accepts either a JSON list or an actual list of MIME types. The result includes expiring artifact URLs, SHA-2

• compile_handoff

  Compile source-agent outputs into a receiver-ready handoff package. The input schema declares the exact source-output, receiver-contract, and handoff-context fields. The tool selects and vali

• inspect_handoff

  Inspect a handoff package and return an acceptance decision. The tool recalculates deliverable hashes, checks expiry and contract satisfaction, and returns the receiving agent's next action.