AGTP Agent Discovery and Name Service

The Agent Transfer Protocol (AGTP) enables agents to communicate once they know each other's canonical identifiers. It does not define how agents find each other. This document specifies the AGTP Agent Discovery and Name Service (ANS): a protocol for dynamic agent discovery using the AGTP DISCOVER method and a governed Agent Name Service that returns ranked sets of Agent Manifest Documents matching a discovery query. ANS servers act as Scope-Enforcement Points for discovery queries and enforce behavioral trust score thresholds, trust tier requirements, and governance zone constraints. This document also defines the DISCOVER method, the Discovery Query language, and the Agent Name Service registration and lookup protocol.