diff --git a/litellm/constants.py b/litellm/constants.py
index 17ad742e419..da0cb680c85 100644
--- a/litellm/constants.py
+++ b/litellm/constants.py
@@ -91,6 +91,14 @@ MAX_MCP_SEMANTIC_FILTER_TOOLS_HEADER_LENGTH = int(
     os.getenv("MAX_MCP_SEMANTIC_FILTER_TOOLS_HEADER_LENGTH", 150)
 )
 
+# Semantic Guard Defaults
+DEFAULT_SEMANTIC_GUARD_EMBEDDING_MODEL = str(
+    os.getenv("DEFAULT_SEMANTIC_GUARD_EMBEDDING_MODEL", "text-embedding-3-small")
+)
+DEFAULT_SEMANTIC_GUARD_SIMILARITY_THRESHOLD = float(
+    os.getenv("DEFAULT_SEMANTIC_GUARD_SIMILARITY_THRESHOLD", 0.75)
+)
+
 # MCP OAuth2 Client Credentials Defaults
 MCP_OAUTH2_TOKEN_EXPIRY_BUFFER_SECONDS = int(
     os.getenv("MCP_OAUTH2_TOKEN_EXPIRY_BUFFER_SECONDS", "60")