Metadata and Query Profile for Efficient Agent Discovery

This document defines a metadata and query profile for efficient discovery of autonomous software agents. The profile describes how agents publish capability metadata using explicit tags, natural- language descriptions, example tasks, protocol bindings, and operational constraints. It also defines JSON metadata, discovery request, and discovery response objects that enable discovery services to combine structured filtering, semantic retrieval, and fine-grained matching while preserving an interoperable protocol surface. The profile does not mandate a specific machine-learning model, embedding model, database, or ranking algorithm. Instead, it standardizes the metadata and result evidence needed by clients and discovery services so that different implementations can interoperate while optimizing their own latency, scalability, and ranking quality.