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/assessing-vector-and-embedding-weaknesses/SKILL.md

@@ -1,6 +1,9 @@
 ---
 name: assessing-vector-and-embedding-weaknesses
-description: Test vector stores for embedding inversion, cross-tenant leakage, and poisoning.
+description: Test RAG vector stores (Pinecone, Qdrant, Weaviate, Chroma, pgvector,
+  FAISS) for embedding inversion, cross-tenant data leakage, and data poisoning per
+  OWASP LLM08:2025. Use when performing an authorized security assessment of a RAG
+  pipeline's retrieval layer or auditing multi-tenant vector-store isolation.
 domain: cybersecurity
 subdomain: ai-security
 tags: