send_secrets tool call.
Carries the user-initiated (uncorrelated) secrets delivered in the
corresponding send_secrets event so ACP clients can enumerate
already-sent bulk session secrets (for dedup UIs like the bulk “Send
secrets” dialog) without parsing the human-readable title string.
secret_names lists the keys; secrets carries the same entries with
their per-entry fields.
Agent-initiated keys (secrets provided in response to a
request_secret request) are intentionally not duplicated
here — they are already discoverable via the per-secret
request_secret tool-call updates’ [RequestSecretMeta]
once those updates reach completed status.