◇ Could this help me?
Yes. All three are legitimate, safety-positive agent-engineering practices: a structured state object removes a whole class of drift failures, the validator loop is the same trust-verification accountability mechanism as the report-card patterns in rows 73 and 76 (never take an agent's completion claim on faith), and small well-scoped tools match published tool-design guidance from the major labs. These are general agent-engineering principles for anyone building agents rather than project-specific, and they make agents safer, not just better.
Review an agent or automation I will describe against three harness principles. 1, state management: does it track progress in a structured state object, or does it rely on the model remembering where it is? Propose a minimal state schema if missing. 2, guardrail loop: for each action the agent can claim to have completed, is there a programmatic check that verifies the action actually happened? List every completion claim that is currently taken on faith and propose a validator for each. 3, tool granularity: list its tools and flag any do-everything tool; propose a redesign into four to six well-scoped tools where anything programmatically computable is its own deterministic tool. Present the findings and proposed changes for approval before implementing anything. The agent is: