Migrating a UniFi Domain to the Field-Symmetry Model

The field-symmetry rule (AGENTS.md, issue #137) requires that every field name a list_* tool exposes in its output must be accepted under the same name by the matching create_* / update_* tool. Violating this causes silent drops (callers believe a constraint was applied; it wasn't) or spurious validation errors. The ACL domain was the pilot (PR #140); 7 network-app domains remain as of April 2026.

Prerequisites

• The domain's existing tools and manager are stable (no open conflicts).
• You know which list_* tool is the canonical shape source for this domain.
• packages/unifi-mcp-shared/src/unifi_mcp_shared/validators.py is available for implementing field validation patterns.

Procedure 1: Audit the Field Gap