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
Available permission options for the user to choose from.
The session ID for this request.
Details about the tool call requiring permission.
Request for user permission to execute a tool call.
Sent when the agent needs authorization before performing a sensitive operation.
See protocol docs: Requesting Permission