News · 2026-07-03

Google publishes ARD, an open standard so AI agents can find each other's tools

Google published an open standard on June 17, 2026 called Agentic Resource Discovery, or ARD, that lets AI agents automatically find and verify the tools and other agents they need -- across company boundaries -- rather than being hand-wired to each one. Backed at launch by Microsoft, Nvidia, Salesforce, GitHub, Hugging Face and others, it is an attempt to build something the agent ecosystem has been missing: a directory service for the machine web.

Key facts

• What: an open specification for publishing, discovering, and verifying AI capabilities across the web, published June 17, 2026.
• How: organizations publish an ai-catalog.json manifest; the system is federated, so each org runs its own catalog and no single company owns the registry.
• Who: launch contributors include Google, Microsoft, Nvidia, Salesforce, GitHub, Hugging Face, Cisco, Databricks, GoDaddy, ServiceNow, and Snowflake.
• Source: the Google Developers Blog announcement.

The background: over the last year, AI agents -- programs that use tools to get work done -- exploded, and a standard called the Model Context Protocol emerged for connecting an agent to a given tool. But MCP tells an agent how to talk to a tool once it knows where the tool is. It does not solve the earlier problem: how does an agent discover that a useful tool or another agent even exists, especially one owned by a different company? Today that discovery is mostly manual -- a developer wires each connection by hand. As agent workflows sprawl across organizations, that hand-wiring does not scale.

ARD is Google's proposed fix. Any organization publishes a manifest file -- an ai-catalog.json -- that lists the tools and agents it offers and how to verify them. Agents can then query these catalogs to find what is available for a given task and connect on the fly. Crucially, the design is federated: there is no central registry that one company controls. Each enterprise maintains its own catalog while participating in a broader discovery network, the way the web itself is decentralized.

The cleanest analogy, and the one the standard invites, is DNS -- the internet's phone book. Before DNS, reaching a computer meant knowing its numeric address; DNS let you look up "where is this name" automatically, and the web became navigable. ARD aims to be that lookup layer for agents and tools: instead of being told exactly where every capability lives, an agent can just ask the directory. If MCP is the protocol for making a call, ARD is the phone book for finding the number.

Why it matters: interoperability standards are unglamorous and enormously consequential -- they decide whether a technology becomes a connected ecosystem or a pile of walled gardens. A discovery layer that actually gets adopted would unlock multi-agent workflows that span vendors, letting an agent at one company safely find and use a service at another. The unusually broad backer list is the real signal: getting Google, Microsoft, Nvidia, Salesforce, GitHub, and Hugging Face to co-sign the same spec is rare, and coverage from outlets like Help Net Security framed it as a serious cross-industry bid to define how the agent web is organized.

The honest caveat: a published specification with prominent logos is a starting gun, not a finish line. Standards succeed only when enough parties actually implement them, and the graveyard of well-intentioned interoperability specs is large. Some observers also note the security stakes -- a discovery layer that lets agents auto-connect to tools across organizations is exactly the kind of surface where authentication and verification have to be airtight, or it becomes a new avenue for prompt-injection and abuse. ARD builds verification into the spec, but whether it holds up under adversarial pressure and real-world adoption is the question the next year will answer. For now, it is the most credible attempt yet to give the agent ecosystem a shared address book.

Primary source, verified: read the paper →

Ground Truth. (2026, July 3). Google publishes ARD, an open standard so AI agents can find each other's tools. Ground Truth. https://groundtruth.day/news/google-publishes-ard-a-dns-for-the-agent-web.html

@misc{groundtruth:google-publishes-ard-a-dns-for-the-agent-web,
  title  = {Google publishes ARD, an open standard so AI agents can find each other's tools},
  author = {{Ground Truth}},
  year   = {2026},
  month  = {jul},
  url    = {https://groundtruth.day/news/google-publishes-ard-a-dns-for-the-agent-web.html}
}

Topics: ai-agents · standards · google · interoperability · mcp