Utility Matrix

Canonical URL Auditor

canonical-url-auditor

Read-onlyIdempotent

Audit a page URL against its canonical tag. Detects missing canonical, self-referencing canonical, and relative URL issues.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`page_url`	Yes	The page URL being audited
`canonical`	Yes	The canonical URL found in the page (empty string if missing)

Output Schema

TableJSON Schema

Name	Required	Description	Default
`issue`	Yes
`page_url`	Yes
`severity`	Yes
`next_step`	Yes
`next_step_url`	Yes
`why_follow_up`	Yes
`interpretation`	Yes
`recommendation`	Yes
`canonical_found`	No
`affiliate_context`	No
`computation_basis`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedOct 1, 2026
- addedInput schema / properties / canonical / maxLength
```
Added value: +2048
```
- addedInput schema / properties / page_url / maxLength
```
Added value: +2048
```

Changed1 schema field changedOct 1, 2026

changedOutput schema / required

Previous value: -[
-  "canonical_found",
-  "computation_basis",
-  "interpretation",
-  "issue",
-  "next_step",
-  "next_step_url",
-  "page_url",
-  "recommendation",
-  "severity",
-  "why_follow_up"
-]New value: +[
+  "computation_basis",
+  "interpretation",
+  "issue",
+  "next_step",
+  "next_step_url",
+  "page_url",
+  "recommendation",
+  "severity",
+  "why_follow_up"
+]

Changed2 schema fields changedSep 28, 2026
- addedInput schema / properties / canonical / examples
```
Added value: +[
+  "example"
+]
```
- addedInput schema / properties / page_url / examples
```
Added value: +[
+  "https://example.com/"
+]
```

Changed1 schema field changedJul 15, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "additionalProperties": false,
+  "properties": {
+    "affiliate_context": {
+      "additionalProperties": false,
+      "properties": {
+        "affiliate": {
+          "type": "string"
+        },
+        "cta_label": {
+          "type": "string"
+        },
+        "disclosure": {
+          "type": "string"
+        },
+        "framing": {
+          "type": "string"
+        },
+        "posture": {
+          "enum": [
+            "secondary"
+          ],
+          "type": "string"
+        },
+        "slot_id": {
+          "type": "string"
+        },
+        "url": {
+          "type": "string"
+        },
+        "variant": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "affiliate",
+        "cta_label",
+        "disclosure",
+        "framing",
+        "posture",
+        "slot_id",
+        "url",
+        "variant"
+      ],
+      "type": "object"
+    },
+    "canonical_found": {
+      "type": "string"
+    },
+    "computation_basis": {
+      "type": "string"
+    },
+    "interpretation": {
+      "type": "string"
+    },
+    "issue": {
+      "type": "string"
+    },
+    "next_step": {
+      "type": "string"
+    },
+    "next_step_url": {
+      "type": "string"
+    },
+    "page_url": {
+      "type": "string"
+    },
+    "recommendation": {
+      "type": "string"
+    },
+    "severity": {
+      "type": "string"
+    },
+    "why_follow_up": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "canonical_found",
+    "computation_basis",
+    "interpretation",
+    "issue",
+    "next_step",
+    "next_step_url",
+    "page_url",
+    "recommendation",
+    "severity",
+    "why_follow_up"
+  ],
+  "type": "object"
+}

Changed1 schema field changedJul 13, 2026
- addedInput schema / additionalProperties
```
Added value: +false
```
First observedJun 29, 2026

TDQS

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