A2A is a standard for one AI agent to delegate a task to another agent and receive the result. ServiceNow's AI Agent Orchestrator uses it to call external agents such as ResolveGrid.
Where MCP connects an agent to tools, A2A connects an agent to other agents. An orchestrating agent describes a task, a specialist agent carries it out, and the result comes back with its context.
Enterprise platforms are becoming orchestrators of many agents. A field service specialist agent that can be called this way fits into those workflows without replacing them.
ResolveGrid can be registered as an external agent that ServiceNow Now Assist hands work orders to, alongside the MCP server for tool-level calls.