Fix

src/sentry/snuba/metrics/extraction.py

@@ -1591,6 +1591,7 @@ def _map_field_name(search_key: str) -> str:
     if resolved == "transaction_name":
         transaction_field = _SEARCH_TO_PROTOCOL_FIELDS.get("transaction")
         return f"event.{transaction_field}"
+
     if resolved.startswith("tags["):
         stripped_search_key = resolved[5:-1]
         # In case a field is identified as a tag but the stripped search key is matching

tests/sentry/snuba/metrics/test_extraction.py

@@ -250,6 +250,26 @@ def test_spec_context_mapping() -> None:
     }
 
 
+def test_spec_tags_mapping() -> None:
+    spec = OnDemandMetricSpec(
+        "count()",
+        "tags[os]:Mac OR os:Windows OR tags[device.family]:Computer OR device.family:Laptop",
+    )
+
+    assert spec._metric_type == "c"
+    assert spec.field_to_extract is None
+    assert spec.op == "sum"
+    assert spec.condition == {
+        "inner": [
+            {"name": "event.contexts.os", "op": "eq", "value": "Mac"},
+            {"name": "event.contexts.os", "op": "eq", "value": "Windows"},
+            {"name": "event.contexts.device.family", "op": "eq", "value": "Computer"},
+            {"name": "event.contexts.device.family", "op": "eq", "value": "Laptop"},
+        ],
+        "op": "or",
+    }
+
+
 def test_spec_query_or_precedence_with_environment() -> None:
     spec_1 = OnDemandMetricSpec(
         "count()",