Rewrite 548 skill descriptions to the activation rubric

Each rewritten description now states both what the skill does (concrete
capability, named tools/artifacts) and an explicit when-to-use trigger,
improving agent discovery/activation. Grounded in each skill's own body;
changes confined to the `description` field only (bodies and all other
frontmatter untouched). Produced by a gated audit->rewrite->recheck loop
(548 -> 0 flagged) with a sampled anti-invention check (0 ungrounded).

Schema: 817/817 pass. Framework-ID gate: 0 defects.

skills/enumerating-cloud-with-cloudfox/SKILL.md

@@ -1,7 +1,10 @@
 ---
 name: enumerating-cloud-with-cloudfox
-description: Map AWS and Azure attack paths and find exploitable misconfigurations with
-  CloudFox.
+description: Run CloudFox's read-only Describe/List/Get enumeration (all-checks,
+  role-trusts, secrets, endpoints, and permissions commands) to map AWS and Azure attack
+  paths and surface exploitable misconfigurations. Use immediately after obtaining a cloud
+  credential to build situational awareness, find exposed resources and secrets, or map
+  sts:AssumeRole trust relationships for lateral-movement/privilege-escalation planning.
 domain: cybersecurity
 subdomain: cloud-security
 tags: