Repeatability
High
The task is structurally identical every time: write middleware functions and corresponding tests against fixed, enumerated requirements. No unique judgment is needed per instance.
Ambiguity Tolerance
High
Success criteria are explicit — MIME whitelist validation, 50 MB limit, path traversal sanitization, and edge-case tests. An agent can verify its own output against these criteria without human interpretation.
Data & Tool Availability
High
The agent needs only the existing Express/Node.js codebase and standard npm packages (multer, mime-types, jest). No external APIs, credentials, or live systems are required to write and test the code.
Error Cost
Medium
Security middleware errors could leave the API exposed to path traversal or MIME spoofing attacks, but the code is reviewed before deployment and the task itself is adding protection, not removing it. A human security review before merging keeps risk manageable.
Human Judgment Required
Low
The whitelist contents and size limit are given; no taste or policy judgment is needed. A developer should audit the sanitization regex for edge cases, but the core implementation requires no human intuition.