Agent Architecture Review, Validation snapshot

Make hand-offs, approvals, and blockers explicit

The handoff is explicit at the protocol level because the first call emits `TASK_STATE_INPUT_REQUIRED` with a concrete instruction to reply `confirm`, and the abort path emits `TASK_STATE_CANCELED`. However, the approval gate is unsafe: `if "confirm" not in user_input.lower()` means phrases like `do not confirm` or `confirm nothing` proceed, and the approval message is not bound to a specific file path or operation instance.

Replace implied magic with clear mental models

The mental model is materially misleading. The approval text says `This will permanently delete the requested file`, the progress message says `Validating target path...`, and the result says `File deleted successfully.`, but the code contains no parsed target path, no validation primitive, and no deletion call. Users or implementers could believe the example demonstrates a complete governed deletion when it is only emitting status text.

Establish trust through inspectability

The workflow does not provide an inspectable production trace for an accountability-sensitive action. `TaskArtifactUpdateEvent` only contains `new_text_artifact(name="result", text="File deleted successfully.")`; there is no audit record of which file was requested, what validation occurred, who confirmed, what exact confirmation was accepted, or whether the final operation actually changed anything. The MCP proxy similarly forwards `_call_tool()` to `client.call_tool(name, arguments or {})` and returns only `result.content`, with no call correlation or audit envelope in this code.

Design for delegation rather than direct manipulation

The executor is structured around delegated work rather than manual steps: `GovernedFileAgent.execute()` creates or resumes an A2A task, emits `TASK_STATE_WORKING`, pauses for approval, resumes, and completes with an artifact. However, delegated authority is still represented only as free text from `context.get_user_input()` / `context.message`; there is no structured target file, constraint envelope, or explicit scope of authority attached to the task before asking the user to confirm deletion.

Apply progressive disclosure to system agency

The default status messages are concise, but there is no deeper inspection layer when confidence or intervention matters. The workflow emits only generic messages such as `Validating target path...`, `Executing file deletion...`, and an artifact with `File deleted successfully.`; it does not expose the target path, validation result, approval record, or action details as inspectable task detail.