A2A agent card
An /.well-known/agent-card.json with the required fields, a coherent endpoint, and a valid signature (if signed). (site-wide file)
Broken variant
Only name + description are present (required fields and a coherent endpoint are missing), and a signature entry has no signature value.
Defect metrics
agentCardInvalidJson |
agentCardMissingFields |
agentCardInvalidSignature |