ExperimentalOptional_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
The MCP-over-ACP connection this message is sent on.
The inner MCP method name.
OptionalparamsOptional inner MCP params.
If omitted or set to null, the inner MCP message has no params.
UNSTABLE
This capability is not part of the spec yet, and may be removed or changed at any point.
Notification parameters for
mcp/message.This is used when the wrapped MCP message is a notification and the outer JSON-RPC envelope has no
id.