This green agent evaluates legal-domain question answering agents using a reproducible, audit-oriented benchmark built on LegalAgentBench. The agent converts original LegalAgentBench tasks into an Agent-to-Agent (A2A) evaluation format and assesses candidate agents on Chinese legal question answering tasks grounded in statutory law and judicial reasoning. For each task, the green agent verifies whether the evaluated agent produces factually correct, legally grounded answers with appropriate use of relevant statutes and reasoning steps. It supports retrieval-augmented evaluation by checking the alignment between generated answers and cited legal sources, and records structured audit traces for each evaluation instance. The evaluation outputs include task-level scores, process-level signals, and auditable artifacts that enable transparent comparison across agents on the leaderboard.