Optional_The _meta property is reserved by ACP to allow clients and agents to attach additional metadata to their interactions. Implementations MUST NOT make assumptions about values at these keys.
See protocol docs: Extensibility
Intended for programmatic or logical use, but can be used as a display name fallback if title isn’t present.
OptionaltitleIntended for UI and end-user contexts — optimized to be human-readable and easily understood.
If not provided, the name should be used for display.
Version of the implementation. Can be displayed to the user or used for debugging or metrics purposes. (e.g. "1.0.0").
Metadata about the implementation of the client or agent. Describes the name and version of an MCP implementation, with an optional title for UI representation.