Structured MCP tool result for the configured sink mode.
Remarks
File mode claims an idempotency lock, stores the secret-bearing result out of
band, returns only a redacted projection, and attempts provider-side cleanup
when the sink write fails. Inline mode returns the explicit inline projection
with a warning.
Throws
Error when provider creation fails or file-sink storage cannot be
completed safely.
Execute a provider operation that creates durable one-time secret material.