fix: Address Greptile review feedback

- Tighten ca_postal_code keyword_pattern: replace broad "address" with
  specific compound terms (mailing/street/shipping/home address)
- Add missing "PIPEDA" tag to policy_templates.json for discoverability
- Add us_phone pattern to test_ca_policy_e2e.py setup to match deployed template
- Add phone number e2e test for complete coverage

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

litellm/proxy/guardrails/guardrail_hooks/litellm_content_filter/patterns.json

@@ -595,7 +595,7 @@
       "pattern": "\\b[ABCEGHJ-NPRSTVXY]\\d[ABCEGHJ-NPRSTV-Z][\\-\\s]?\\d[ABCEGHJ-NPRSTV-Z]\\d\\b",
       "category": "Canadian PII Patterns",
       "description": "Detects Canadian postal codes (A1A 1A1 format, excludes invalid first-letter characters per Canada Post spec)",
-      "keyword_pattern": "\\b(?:postal\\s*code|zip\\s*code|mailing\\s*address|address|code\\s*postal|postcode)\\b",
+      "keyword_pattern": "\\b(?:postal\\s*code|zip\\s*code|mailing\\s*address|street\\s*address|shipping\\s*address|home\\s*address|code\\s*postal|postcode)\\b",
       "allow_word_numbers": false
     },
     {

policy_templates.json

@@ -2704,6 +2704,7 @@
     "tags": [
       "PII Protection",
       "Canada",
+      "PIPEDA",
       "FIPPA"
     ],
     "estimated_latency_ms": 1

tests/test_litellm/proxy/guardrails/guardrail_hooks/content_filter/test_ca_policy_e2e.py

@@ -68,6 +68,11 @@ class TestCanadianPIIPolicyE2E:
                 pattern_name="email",
                 action=ContentFilterAction.MASK,
             ),
+            ContentFilterPattern(
+                pattern_type="prebuilt",
+                pattern_name="us_phone",
+                action=ContentFilterAction.MASK,
+            ),
             ContentFilterPattern(
                 pattern_type="prebuilt",
                 pattern_name="ca_postal_code",
@@ -344,6 +349,26 @@ class TestCanadianPIIPolicyE2E:
         assert "REDACTED" not in output
         assert output == text
 
+    # =====================
+    # Phone Number tests
+    # =====================
+
+    @pytest.mark.asyncio
+    async def test_phone_number_masked(self):
+        """North American phone number is detected and masked"""
+        guardrail = self.setup_canadian_guardrail()
+
+        text = "Call me at (416) 555-1234 to discuss."
+        result = await guardrail.apply_guardrail(
+            inputs={"texts": [text]},
+            request_data={},
+            input_type="request",
+        )
+        output = result.get("texts", [])[0]
+
+        assert "REDACTED" in output
+        assert "(416) 555-1234" not in output
+
     # =====================
     # Postal Code tests
     # =====================