SEO GSC Wizard MCP

Branded vs non-branded performance

get_branded_performance

Read-only

Use this when the user asks how much search traffic is branded: splits it into BRANDED and NON-BRANDED using the branded keywords saved on the property (set them with update_site; a keyword wrapped in slashes like /acme ?corp/ is treated as a regex, otherwise it is a case-insensitive substring). Not for other keyword groups: use get_topic_cluster_performance. Returns totals, the branded share of clicks, a daily clicks trend for both sides (date ascending), and the top queries on each side (clicks descending), with optional comparison-period totals. nonBranded is the property total minus branded, so the two sides add up to the property total (total) and brandedClickShare is branded clicks over that total (0-100, like ctr). Search Console leaves anonymised queries out of any query-filtered read, so they cannot be matched against the keywords: these long-tail searches are counted in nonBranded and reported on their own as anonymized, so brandedClickShare is a floor, and coverage.hiddenClicksShare (0-1) is the share of the property's clicks with no query row. topNonBrandedQueries lists named queries only. Returns notConfigured (not an error) when the property has no branded keywords yet. Served from the GSC Wizard ClickHouse warehouse when available, otherwise the live Search Console API (see dataSource). Date range is optional: omit startDate/endDate to analyze the last 28 settled days (data lags ~2-3 days).

Input Schema

Name	Required	Description	Default
`limit`	No	How many top queries to return per side.
`endDate`	No	Optional. Window end as YYYY-MM-DD (e.g. 2026-05-31). You do NOT need to know today's date or the latest available date: omit this and the server uses the latest settled Search Console date (data lags ~2-3 days behind today). Never pass null or the string "null".
`siteUrl`	Yes
`startDate`	No	Optional. Window start as YYYY-MM-DD (e.g. 2026-05-03). You do NOT need to know today's date. Omit BOTH startDate and endDate to analyze the last 28 settled days automatically (Search Console data lags ~2-3 days). Never pass null or the string "null".
`searchType`	No	Search type: web (default), image, video, news (the News tab), discover, googleNews (news.google.com), or all (web + image + video + news + discover combined, position impression-weighted, like the app's "All" filter). Discover and googleNews carry no query dimension, so query-level results for them are empty, and no position: it reads null, not 0.	web
`comparisonEndDate`	No	Optional. End of the comparison period as YYYY-MM-DD. Provide BOTH comparison dates to compare two periods; omit both for no comparison (prev* fields are then 0 and hasComparison false).
`comparisonStartDate`	No	Optional. Start of the comparison period as YYYY-MM-DD. Provide BOTH comparison dates to compare two periods; omit both for no comparison (prev* fields are then 0 and hasComparison false).

Output Schema

Name	Required	Description
`hint`	No
`note`	No
`daily`	No
`range`	No
`total`	No
`reason`	No
`thenBy`	No
`branded`	No
`listKey`	No	Name of the top-level field that holds the rows sortedBy describes.
`siteUrl`	No
`warning`	No
`coverage`	No	How much of the property total the rows cover, totals inline. Quote totals from here; do not sum rows.
`nextStep`	No
`ordering`	No
`previous`	No
`sortedBy`	No
`sortOrder`	No
`thenOrder`	No
`anonymized`	No
`dataSource`	No
`nonBranded`	No
`searchType`	No
`partialDays`	No
`dataMaturity`	No
`emptyBecause`	No
`methodLimits`	No
`hasComparison`	No
`notConfigured`	No
`savedKeywords`	No
`settledThrough`	No
`brandedKeywords`	No
`comparisonRange`	No
`brandedClickShare`	No
`topBrandedQueries`	No
`brandedKeywordCount`	No
`coverageUnavailable`	No	Why coverage is null, when it is.
`warehouseLatestDate`	No
`topNonBrandedQueries`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 28, 2026

addedOutput schema / properties / listKey

Added value: +{
+  "$ref": "#/properties/siteUrl",
+  "description": "Name of the top-level field that holds the rows sortedBy describes."
+}

Changed1 schema field changedOct 25, 2026

changedInput schema / properties / searchType / description

Previous value: -"Search type: web (default), image, video, news (the News tab), discover, googleNews (news.google.com), or all (web + image + video + news + discover combined, position impression-weighted, like the app's \"All\" filter). Discover and googleNews carry no query dimension, so query-level results for them are empty."New value: +"Search type: web (default), image, video, news (the News tab), discover, googleNews (news.google.com), or all (web + image + video + news + discover combined, position impression-weighted, like the app's \"All\" filter). Discover and googleNews carry no query dimension, so query-level results for them are empty, and no position: it reads null, not 0."

Changed2 schema fields changedOct 25, 2026

addedInput schema / properties / searchType / description

Added value: +"Search type: web (default), image, video, news (the News tab), discover, googleNews (news.google.com), or all (web + image + video + news + discover combined, position impression-weighted, like the app's \"All\" filter). Discover and googleNews carry no query dimension, so query-level results for them are empty."

changedInput schema / properties / searchType / enum

Previous value: -[
-  "web",
-  "image",
-  "video",
-  "news"
-]New value: +[
+  "web",
+  "image",
+  "video",
+  "news",
+  "discover",
+  "googleNews",
+  "all"
+]

Changed24 schema fields changedOct 18, 2026

changedOutput schema / additionalProperties
```
Previous value: -falseNew value: +true
```

changedOutput schema / properties / anonymized / anyOf

Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "clicks": {
-        "$ref": "#/properties/range/anyOf/0/properties/days"
-      },
-      "ctr": {
-        "$ref": "#/properties/range/anyOf/0/properties/days"
-      },
-      "impressions": {
-        "$ref": "#/properties/range/anyOf/0/properties/days"
-      },
-      "position": {
-        "$ref": "#/properties/range/anyOf/0/properties/days"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": true,
+    "properties": {
+      "clicks": {
+        "$ref": "#/properties/range/anyOf/0/properties/days"
+      },
+      "ctr": {
+        "$ref": "#/properties/range/anyOf/0/properties/days"
+      },
+      "impressions": {
+        "$ref": "#/properties/range/anyOf/0/properties/days"
+      },
+      "position": {
+        "$ref": "#/properties/range/anyOf/0/properties/days"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

changedOutput schema / properties / branded / anyOf

Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "clicks": {
-        "$ref": "#/properties/range/anyOf/0/properties/days"
-      },
-      "ctr": {
-        "$ref": "#/properties/range/anyOf/0/properties/days"
-      },
-      "impressions": {
-        "$ref": "#/properties/range/anyOf/0/properties/days"
-      },
-      "position": {
-        "$ref": "#/properties/range/anyOf/0/properties/days"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": true,
+    "properties": {
+      "clicks": {
+        "$ref": "#/properties/range/anyOf/0/properties/days"
+      },
+      "ctr": {
+        "$ref": "#/properties/range/anyOf/0/properties/days"
+      },
+      "impressions": {
+        "$ref": "#/properties/range/anyOf/0/properties/days"
+      },
+      "position": {
+        "$ref": "#/properties/range/anyOf/0/properties/days"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

changedOutput schema / properties / brandedKeywords / anyOf

Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "skipped": {
-        "$ref": "#/properties/savedKeywords"
-      },
-      "total": {
-        "$ref": "#/properties/range/anyOf/0/properties/days"
-      },
-      "used": {
-        "$ref": "#/properties/range/anyOf/0/properties/days"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": true,
+    "properties": {
+      "skipped": {
+        "$ref": "#/properties/savedKeywords"
+      },
+      "total": {
+        "$ref": "#/properties/range/anyOf/0/properties/days"
+      },
+      "used": {
+        "$ref": "#/properties/range/anyOf/0/properties/days"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

addedOutput schema / properties / coverage

Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": true,
+      "properties": {
+        "clicksCovered": {
+          "$ref": "#/properties/range/anyOf/0/properties/days",
+          "description": "0-1 share of the totals named by sharesOf that this page's rows carry."
+        },
+        "filteredTotals": {
+          "$ref": "#/properties/coverage/anyOf/0/properties/siteTotals",
+          "description": "The same totals with the filters applied (scope \"filtered\")."
+        },
+        "hiddenClicksShare": {
+          "$ref": "#/properties/range/anyOf/0/properties/days",
+          "description": "0-1 share of those totals that no row of this dimension carries (anonymised queries on query rows, near zero on page, country and device rows); null when unknown."
+        },
+        "hiddenImpressionsShare": {
+          "$ref": "#/properties/range/anyOf/0/properties/days"
+        },
+        "impressionsCovered": {
+          "$ref": "#/properties/range/anyOf/0/properties/days"
+        },
+        "note": {
+          "$ref": "#/properties/siteUrl",
+          "description": "Why some fields are null, when they are."
+        },
+        "rowsReturned": {
+          "$ref": "#/properties/range/anyOf/0/properties/days",
+          "description": "Rows on this page."
+        },
+        "rowsTotal": {
+          "$ref": "#/properties/range/anyOf/0/properties/days",
+          "description": "Rows across every page; null when unknown."
+        },
+        "scope": {
+          "$ref": "#/properties/siteUrl",
+          "description": "\"property\", or \"filtered\" when the rows were read with filters."
+        },
+        "sharesOf": {
+          "$ref": "#/properties/siteUrl",
+          "description": "\"siteTotals\", or \"filteredTotals\" when scope is \"filtered\"."
+        },
+        "siteTotals": {
+          "anyOf": [
+            {
+              "additionalProperties": true,
+              "properties": {
+                "avgPositionWeighted": {
+                  "$ref": "#/properties/range/anyOf/0/properties/days",
+                  "description": "Impression-weighted average position."
+                },
+                "clicks": {
+                  "$ref": "#/properties/range/anyOf/0/properties/days"
+                },
+                "ctrPercent": {
+                  "$ref": "#/properties/range/anyOf/0/properties/days",
+                  "description": "A 0-100 percentage."
+                },
+                "impressions": {
+                  "$ref": "#/properties/range/anyOf/0/properties/days"
+                }
+              },
+              "type": "object"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "description": "The property's totals for this window and search type, with no dimension and no filter."
+        },
+        "totalsFrom": {
+          "$ref": "#/properties/siteUrl",
+          "description": "\"get_site_summary\" (the read and arithmetic that tool uses) or \"property_totals\" (the same, for a search type other than web)."
+        }
+      },
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "How much of the property total the rows cover, totals inline. Quote totals from here; do not sum rows."
+}

addedOutput schema / properties / coverageUnavailable

Added value: +{
+  "$ref": "#/properties/siteUrl",
+  "description": "Why coverage is null, when it is."
+}

changedOutput schema / properties / daily / items / additionalProperties
```
Previous value: -falseNew value: +true
```

changedOutput schema / properties / dataMaturity / anyOf

Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "dateBasis": {
-        "$ref": "#/properties/siteUrl"
-      },
-      "firstIncompleteDate": {
-        "$ref": "#/properties/siteUrl"
-      },
-      "note": {
-        "$ref": "#/properties/siteUrl"
-      },
-      "probe": {
-        "anyOf": [
-          {
-            "additionalProperties": false,
-            "properties": {
-              "dataState": {
-                "$ref": "#/properties/siteUrl"
-              },
-              "endDate": {
-                "$ref": "#/properties/siteUrl"
-              },
-              "searchType": {
-                "$ref": "#/properties/siteUrl"
-              },
-              "startDate": {
-                "$ref": "#/properties/siteUrl"
-              }
-            },
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "settledThrough": {
-        "$ref": "#/properties/siteUrl"
-      },
-      "source": {
-        "$ref": "#/properties/siteUrl"
-      },
-      "warehouseCutoff": {
-        "$ref": "#/properties/siteUrl"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": true,
+    "properties": {
+      "dateBasis": {
+        "$ref": "#/properties/siteUrl"
+      },
+      "firstIncompleteDate": {
+        "$ref": "#/properties/siteUrl"
+      },
+      "note": {
+        "$ref": "#/properties/siteUrl"
+      },
+      "probe": {
+        "anyOf": [
+          {
+            "additionalProperties": true,
+            "properties": {
+              "dataState": {
+                "$ref": "#/properties/siteUrl"
+              },
+              "endDate": {
+                "$ref": "#/properties/siteUrl"
+              },
+              "searchType": {
+                "$ref": "#/properties/siteUrl"
+              },
+              "startDate": {
+                "$ref": "#/properties/siteUrl"
+              }
+            },
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "settledThrough": {
+        "$ref": "#/properties/siteUrl"
+      },
+      "source": {
+        "$ref": "#/properties/siteUrl"
+      },
+      "warehouseCutoff": {
+        "$ref": "#/properties/siteUrl"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

addedOutput schema / properties / emptyBecause

Added value: +{
+  "$ref": "#/properties/siteUrl"
+}

addedOutput schema / properties / methodLimits

Added value: +{
+  "$ref": "#/properties/siteUrl"
+}

addedOutput schema / properties / nextStep

Added value: +{
+  "$ref": "#/properties/siteUrl"
+}

changedOutput schema / properties / nonBranded / anyOf

Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "clicks": {
-        "$ref": "#/properties/range/anyOf/0/properties/days"
-      },
-      "ctr": {
-        "$ref": "#/properties/range/anyOf/0/properties/days"
-      },
-      "impressions": {
-        "$ref": "#/properties/range/anyOf/0/properties/days"
-      },
-      "position": {
-        "$ref": "#/properties/range/anyOf/0/properties/days"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": true,
+    "properties": {
+      "clicks": {
+        "$ref": "#/properties/range/anyOf/0/properties/days"
+      },
+      "ctr": {
+        "$ref": "#/properties/range/anyOf/0/properties/days"
+      },
+      "impressions": {
+        "$ref": "#/properties/range/anyOf/0/properties/days"
+      },
+      "position": {
+        "$ref": "#/properties/range/anyOf/0/properties/days"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

addedOutput schema / properties / ordering

Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": {
+        "additionalProperties": true,
+        "properties": {
+          "sortOrder": {
+            "$ref": "#/properties/siteUrl"
+          },
+          "sortedBy": {
+            "$ref": "#/properties/siteUrl"
+          },
+          "thenBy": {
+            "$ref": "#/properties/siteUrl"
+          },
+          "thenOrder": {
+            "$ref": "#/properties/siteUrl"
+          }
+        },
+        "type": "object"
+      },
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / partialDays

Added value: +{
+  "$ref": "#/properties/savedKeywords"
+}

changedOutput schema / properties / previous / anyOf

Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "branded": {
-        "anyOf": [
-          {
-            "additionalProperties": false,
-            "properties": {
-              "clicks": {
-                "$ref": "#/properties/range/anyOf/0/properties/days"
-              },
-              "ctr": {
-                "$ref": "#/properties/range/anyOf/0/properties/days"
-              },
-              "impressions": {
-                "$ref": "#/properties/range/anyOf/0/properties/days"
-              },
-              "position": {
-                "$ref": "#/properties/range/anyOf/0/properties/days"
-              }
-            },
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "brandedClickShare": {
-        "$ref": "#/properties/range/anyOf/0/properties/days"
-      },
-      "nonBranded": {
-        "anyOf": [
-          {
-            "additionalProperties": false,
-            "properties": {
-              "clicks": {
-                "$ref": "#/properties/range/anyOf/0/properties/days"
-              },
-              "ctr": {
-                "$ref": "#/properties/range/anyOf/0/properties/days"
-              },
-              "impressions": {
-                "$ref": "#/properties/range/anyOf/0/properties/days"
-              },
-              "position": {
-                "$ref": "#/properties/range/anyOf/0/properties/days"
-              }
-            },
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "total": {
-        "anyOf": [
-          {
-            "additionalProperties": false,
-            "properties": {
-              "clicks": {
-                "$ref": "#/properties/range/anyOf/0/properties/days"
-              },
-              "ctr": {
-                "$ref": "#/properties/range/anyOf/0/properties/days"
-              },
-              "impressions": {
-                "$ref": "#/properties/range/anyOf/0/properties/days"
-              },
-              "position": {
-                "$ref": "#/properties/range/anyOf/0/properties/days"
-              }
-            },
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": true,
+    "properties": {
+      "branded": {
+        "anyOf": [
+          {
+            "additionalProperties": true,
+            "properties": {
+              "clicks": {
+                "$ref": "#/properties/range/anyOf/0/properties/days"
+              },
+              "ctr": {
+                "$ref": "#/properties/range/anyOf/0/properties/days"
+              },
+              "impressions": {
+                "$ref": "#/properties/range/anyOf/0/properties/days"
+              },
+              "position": {
+                "$ref": "#/properties/range/anyOf/0/properties/days"
+              }
+            },
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "brandedClickShare": {
+        "$ref": "#/properties/range/anyOf/0/properties/days"
+      },
+      "nonBranded": {
+        "anyOf": [
+          {
+            "additionalProperties": true,
+            "properties": {
+              "clicks": {
+                "$ref": "#/properties/range/anyOf/0/properties/days"
+              },
+              "ctr": {
+                "$ref": "#/properties/range/anyOf/0/properties/days"
+              },
+              "impressions": {
+                "$ref": "#/properties/range/anyOf/0/properties/days"
+              },
+              "position": {
+                "$ref": "#/properties/range/anyOf/0/properties/days"
+              }
+            },
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "total": {
+        "anyOf": [
+          {
+            "additionalProperties": true,
+            "properties": {
+              "clicks": {
+                "$ref": "#/properties/range/anyOf/0/properties/days"
+              },
+              "ctr": {
+                "$ref": "#/properties/range/anyOf/0/properties/days"
+              },
+              "impressions": {
+                "$ref": "#/properties/range/anyOf/0/properties/days"
+              },
+              "position": {
+                "$ref": "#/properties/range/anyOf/0/properties/days"
+              }
+            },
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

changedOutput schema / properties / range / anyOf

Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "days": {
-        "type": [
-          "number",
-          "null"
-        ]
-      },
-      "endDate": {
-        "$ref": "#/properties/siteUrl"
-      },
-      "startDate": {
-        "$ref": "#/properties/siteUrl"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": true,
+    "properties": {
+      "days": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "endDate": {
+        "$ref": "#/properties/siteUrl"
+      },
+      "startDate": {
+        "$ref": "#/properties/siteUrl"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

addedOutput schema / properties / sortOrder

Added value: +{
+  "$ref": "#/properties/siteUrl"
+}

addedOutput schema / properties / sortedBy

Added value: +{
+  "$ref": "#/properties/siteUrl"
+}

addedOutput schema / properties / thenBy

Added value: +{
+  "$ref": "#/properties/siteUrl"
+}

addedOutput schema / properties / thenOrder

Added value: +{
+  "$ref": "#/properties/siteUrl"
+}

changedOutput schema / properties / topBrandedQueries / items / additionalProperties
```
Previous value: -falseNew value: +true
```
changedOutput schema / properties / topNonBrandedQueries / items / additionalProperties
```
Previous value: -falseNew value: +true
```

changedOutput schema / properties / total / anyOf

Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "clicks": {
-        "$ref": "#/properties/range/anyOf/0/properties/days"
-      },
-      "ctr": {
-        "$ref": "#/properties/range/anyOf/0/properties/days"
-      },
-      "impressions": {
-        "$ref": "#/properties/range/anyOf/0/properties/days"
-      },
-      "position": {
-        "$ref": "#/properties/range/anyOf/0/properties/days"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": true,
+    "properties": {
+      "clicks": {
+        "$ref": "#/properties/range/anyOf/0/properties/days"
+      },
+      "ctr": {
+        "$ref": "#/properties/range/anyOf/0/properties/days"
+      },
+      "impressions": {
+        "$ref": "#/properties/range/anyOf/0/properties/days"
+      },
+      "position": {
+        "$ref": "#/properties/range/anyOf/0/properties/days"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

addedOutput schema / properties / warning

Added value: +{
+  "$ref": "#/properties/siteUrl"
+}

Changed1 schema field changedOct 10, 2026
- addedOutput schema / properties / warehouseLatestDate
```
Added value: +{
+  "$ref": "#/properties/siteUrl"
+}
```
First observedOct 7, 2026

TDQS

A4.8/5.0

Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations only give readOnly/openWorld/destructive hints; the description adds substantial context beyond that: anonymised-query exclusion and how it affects brandedClickShare as a floor, coverage.hiddenClicksShare, notConfigured as a non-error, and the ClickHouse-vs-live-API dataSource fallback. This is exactly the extra behavioral detail the annotations cannot convey.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Front-loaded with the use-case and routing before the return-value anatomy, and nearly every clause carries information (branded share math, anonymization caveat, dataSource). It is dense and somewhat run-on in the long middle sentence, which slightly hurts scannability.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a 7-param tool with an output schema, the description is complete: it explains the return shape (totals, branded share, daily trend ordering, top queries ordering), the anonymized edge case, and the notConfigured state. An agent has everything needed to call and interpret it.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 86%, so the baseline is 3, but the description adds real meaning: the regex-vs-substring keyword matching rule, the optional date range defaulting to 28 settled days, and the comparison-period semantics beyond the schema. It omits per-parameter detail (limit, searchType enum), so not a 5.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource ('splits search traffic into BRANDED and NON-BRANDED') and immediately names the sibling it is not for ('get_topic_cluster_performance'). An agent can distinguish it from other performance tools without opening schemas.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Explicit 'Use this when the user asks how much search traffic is branded' plus a clear exclusion ('Not for other keyword groups: use get_topic_cluster_performance') and the configuration prerequisite (keywords set with update_site). This is the strongest form of routing guidance.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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