diff --git a/agents-api/agents_api/autogen/Docs.py b/agents-api/agents_api/autogen/Docs.py
index 2472c4b2d..5348add47 100644
--- a/agents-api/agents_api/autogen/Docs.py
+++ b/agents-api/agents_api/autogen/Docs.py
@@ -153,7 +153,7 @@ class HybridDocSearchRequest(BaseDocSearchRequest):
     model_config = ConfigDict(
         populate_by_name=True,
     )
-    confidence: Annotated[float, Field(ge=0.0, le=1.0)] = 0
+    confidence: Annotated[float, Field(ge=-1.0, le=1.0)] = 0
     """
     The confidence cutoff level
     """
@@ -222,7 +222,7 @@ class VectorDocSearchRequest(BaseDocSearchRequest):
     model_config = ConfigDict(
         populate_by_name=True,
     )
-    confidence: Annotated[float, Field(ge=0.0, le=1.0)] = 0
+    confidence: Annotated[float, Field(ge=-1.0, le=1.0)] = 0
     """
     The confidence cutoff level
     """
diff --git a/integrations-service/integrations/autogen/Docs.py b/integrations-service/integrations/autogen/Docs.py
index 2472c4b2d..5348add47 100644
--- a/integrations-service/integrations/autogen/Docs.py
+++ b/integrations-service/integrations/autogen/Docs.py
@@ -153,7 +153,7 @@ class HybridDocSearchRequest(BaseDocSearchRequest):
     model_config = ConfigDict(
         populate_by_name=True,
     )
-    confidence: Annotated[float, Field(ge=0.0, le=1.0)] = 0
+    confidence: Annotated[float, Field(ge=-1.0, le=1.0)] = 0
     """
     The confidence cutoff level
     """
@@ -222,7 +222,7 @@ class VectorDocSearchRequest(BaseDocSearchRequest):
     model_config = ConfigDict(
         populate_by_name=True,
     )
-    confidence: Annotated[float, Field(ge=0.0, le=1.0)] = 0
+    confidence: Annotated[float, Field(ge=-1.0, le=1.0)] = 0
     """
     The confidence cutoff level
     """
diff --git a/memory-store/migrations/000022_vector_search.up.sql b/memory-store/migrations/000022_vector_search.up.sql
index 53cefcf4e..40866f920 100644
--- a/memory-store/migrations/000022_vector_search.up.sql
+++ b/memory-store/migrations/000022_vector_search.up.sql
@@ -6,7 +6,7 @@ CREATE OR REPLACE FUNCTION search_by_vector (
     owner_types TEXT[],
     owner_ids UUID [],
     k integer DEFAULT 3,
-    confidence float DEFAULT 0.5,
+    confidence float DEFAULT 0.0,
     metadata_filter jsonb DEFAULT NULL
 ) RETURNS SETOF doc_search_result LANGUAGE plpgsql AS $$
 DECLARE
@@ -19,8 +19,8 @@ BEGIN
         RAISE EXCEPTION 'k must be greater than 0';
     END IF;
 
-    IF confidence < 0 OR confidence > 1 THEN
-        RAISE EXCEPTION 'confidence must be between 0 and 1';
+    IF confidence < -1 OR confidence > 1 THEN
+        RAISE EXCEPTION 'confidence must be between -1 and 1';
     END IF;
 
     IF owner_types IS NOT NULL AND owner_ids IS NOT NULL AND
@@ -29,7 +29,7 @@ BEGIN
     END IF;
 
     -- Calculate search threshold from confidence
-    search_threshold := confidence;
+    search_threshold := 1.0 - confidence;
 
     -- Build owner filter SQL
     owner_filter_sql := '
@@ -53,7 +53,7 @@ BEGIN
                 d.index,
                 d.title,
                 d.content,
-                ((1 - (d.embedding <=> $1)) + 1) * 0.5 as distance,
+                (d.embedding <=> $1) as distance,
                 d.embedding,
                 d.metadata,
                 doc_owners.owner_type,
@@ -61,15 +61,15 @@ BEGIN
             FROM docs_embeddings d
             LEFT JOIN doc_owners ON d.doc_id = doc_owners.doc_id
             WHERE d.developer_id = $7
-            AND ((1 - (d.embedding <=> $1)) + 1) * 0.5 >= $2
+            AND (d.embedding <=> $1) <= $2
             %s
             %s
-            ORDER BY ((1 - (d.embedding <=> $1)) + 1) * 0.5 DESC
+            ORDER BY (d.embedding <=> $1) ASC
             LIMIT ($3 * 4)  -- Get more candidates than needed
         )
         SELECT DISTINCT ON (doc_id) *
         FROM ranked_docs
-        ORDER BY doc_id, distance DESC
+        ORDER BY doc_id, distance ASC
         LIMIT $3',
         owner_filter_sql,
         metadata_filter_sql
diff --git a/typespec/docs/models.tsp b/typespec/docs/models.tsp
index 6310b42c5..5418cafd9 100644
--- a/typespec/docs/models.tsp
+++ b/typespec/docs/models.tsp
@@ -125,7 +125,7 @@ model BaseDocSearchRequest {
 
 model VectorDocSearchRequest extends BaseDocSearchRequest {
     /** The confidence cutoff level */
-    @minValue(0)
+    @minValue(-1)
     @maxValue(1)
     confidence: float = 0;
 
@@ -146,7 +146,7 @@ model TextOnlyDocSearchRequest extends BaseDocSearchRequest {
 
 model HybridDocSearchRequest extends BaseDocSearchRequest {
     /** The confidence cutoff level */
-    @minValue(0)
+    @minValue(-1)
     @maxValue(1)
     confidence: float = 0;
 
diff --git a/typespec/tsp-output/@typespec/openapi3/openapi-1.0.0.yaml b/typespec/tsp-output/@typespec/openapi3/openapi-1.0.0.yaml
index 8861ae9cd..5906ce6a9 100644
--- a/typespec/tsp-output/@typespec/openapi3/openapi-1.0.0.yaml
+++ b/typespec/tsp-output/@typespec/openapi3/openapi-1.0.0.yaml
@@ -2983,7 +2983,7 @@ components:
       properties:
         confidence:
           type: number
-          minimum: 0
+          minimum: -1
           maximum: 1
           description: The confidence cutoff level
           default: 0
@@ -3066,7 +3066,7 @@ components:
       properties:
         confidence:
           type: number
-          minimum: 0
+          minimum: -1
           maximum: 1
           description: The confidence cutoff level
           default: 0