diff --git a/skills_autoload/rag-retrieve/hooks/retrieval-policy.md b/skills_autoload/rag-retrieve/hooks/retrieval-policy.md
index 6527185..fce1bfc 100644
--- a/skills_autoload/rag-retrieve/hooks/retrieval-policy.md
+++ b/skills_autoload/rag-retrieve/hooks/retrieval-policy.md
@@ -3,6 +3,7 @@
 ### 1. Retrieval Order and Tool Selection
 - Follow this section for source choice, tool choice, query rewrite, `top_k`, fallback, result handling, and citations.
 - Use this default retrieval order and execute it sequentially: skill-enabled knowledge retrieval tools > `rag_retrieve` / `table_rag_retrieve` > local filesystem retrieval.
+- Important: local filesystem retrieval and `rag_retrieve` / `table_rag_retrieve` do NOT share the same underlying data source. They are not equivalent, and one source cannot be used to assume coverage in the other.
 - Do NOT answer from model knowledge first.
 - Do NOT skip directly to local filesystem retrieval when an earlier retrieval source may answer the question.
 - When a suitable skill-enabled knowledge retrieval tool is available, use it first.
@@ -32,6 +33,9 @@
 
 ### 5. Fallback and Sequential Retry
 - If the first retrieval result is insufficient, call the next retrieval source in the default order before replying.
+- Important: local filesystem retrieval and `rag_retrieve` / `table_rag_retrieve` do NOT share the same underlying data source. They are not equivalent, and results from one cannot be used to assume coverage in the other.
+- Even if `rag_retrieve` or `table_rag_retrieve` returns relevant results, local filesystem retrieval may still contain different or additional information; likewise, local files may contain information absent from the RAG knowledge base.
+- Therefore, when fallback is required, do NOT skip local filesystem retrieval on the assumption that RAG already covers the same documents, and do NOT treat a local-file miss as evidence that the RAG knowledge base also lacks the information.
 - If the first RAG tool is insufficient, call the other RAG tool next before moving to local filesystem retrieval.
 - If `table_rag_retrieve` is insufficient or empty, continue with `rag_retrieve`.
 - If `rag_retrieve` is insufficient or empty, continue with `table_rag_retrieve`.