A Standardized Framework for Intelligent Body Capability Discovery
A2A protocol establishes a standardized description system of intelligent body capabilities through AgentCard mechanism. This JSON-based declarative file contains key metadata such as functional description, service endpoint address, authentication requirements, etc., forming a standardized capability profile similar to a technical "ID card". Any intelligent body compliant with A2A protocol will automatically generate AgentCard at startup and expose it to the public through HTTP interface.
In terms of implementation, the developer simply accesses the /card endpoint of the smartbody to get a full description of the service. For example, requesting a local test smartbody via the curl command:curl http://localhost:8080/a2a/card, which will return the file containing the
- Intelligent body name and version identification
- List of supported task types
- Input and output data format specification
- Authentication method requirements
and other important information.
This mechanism enables client-side intelligences to dynamically discover and assess the adaptability of collaborators, and realize accurate service matching in complex multi-intelligence environments. In the case of procurement process automation in a multinational enterprise, the order processing intelligence can significantly reduce the risk of integration failure by querying the AgentCard of the inventory management intelligence in real time and confirming that it supports EDI standard message processing before establishing a connection.
This answer comes from the articleA2A: Google releases open protocol for communication between AI intelligencesThe
