Investigation Cost Guardrail Skill

Overview

This skill provides cost guardrails for ANY AWS service and ALL native agent tools — not just a hardcoded list. It uses heuristic classification to determine whether an API operation is free or paid, estimates cost before execution, and enforces per-investigation budgets.

Design Principle

Rather than listing every free/paid operation across 200+ AWS services, this skill uses three layers:

1. Heuristic rules — classify any operation based on naming patterns and behavior
2. Known-paid registry — explicit overrides for high-cost operations with pricing formulas
3. Response validation — detect metered usage from API response fields after execution

Activation

This skill MUST be ALWAYS ACTIVE during investigations. It does NOT require user invocation.

Fetch Live Rate Before Estimating