GovGazette

Check source dates

freshness

Read-onlyIdempotent

Report actual source dates, coverage, record counts and SHA256 provenance.

Input Schema

TableJSON Schema

Name	Required	Description	Default
No arguments

Output Schema

TableJSON Schema

Name	Required	Description	Default
`history`	Yes
`sources`	Yes
`generation`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed7 schema fields changedOct 8, 2026

addedOutput schema / $defs / FreshnessState

Added value: +{
+  "enum": [
+    "fresh",
+    "stale",
+    "unknown",
+    "unavailable"
+  ],
+  "type": "string"
+}

addedOutput schema / $defs / SourceCoverage / properties / exclusion_freshness

Added value: +{
+  "anyOf": [
+    {
+      "$ref": "#/$defs/SourceFreshness"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / $defs / SourceCoverage / properties / reference_edition
```
Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}
```
addedOutput schema / $defs / SourceCoverage / properties / reference_scope
```
Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}
```

addedOutput schema / $defs / SourceCoverage / properties / source_date_kind

Added value: +{
+  "description": "Meaning of the supplied date; not an importer or scheduler timestamp.",
+  "type": "string"
+}

changedOutput schema / $defs / SourceCoverage / required

Previous value: -[
-  "dataset",
-  "source_url",
-  "source_date",
-  "sha256",
-  "input_rows",
-  "public_rows"
-]New value: +[
+  "dataset",
+  "source_url",
+  "source_date",
+  "sha256",
+  "input_rows",
+  "public_rows",
+  "source_date_kind"
+]

addedOutput schema / $defs / SourceFreshness

Added value: +{
+  "properties": {
+    "attention_required": {
+      "type": "boolean"
+    },
+    "evaluated_at": {
+      "description": "UTC time when age was evaluated; source and observation dates are unchanged.",
+      "type": "string"
+    },
+    "max_age_seconds": {
+      "description": "Explicit warning threshold for this daily snapshot. Not a scheduler promise.",
+      "format": "int64",
+      "type": "integer"
+    },
+    "source_age_seconds": {
+      "description": "Age of the official source timestamp, never the import or enrichment timestamp.",
+      "format": "int64",
+      "type": [
+        "integer",
+        "null"
+      ]
+    },
+    "state": {
+      "$ref": "#/$defs/FreshnessState"
+    },
+    "warn_age_seconds": {
+      "description": "Early-warning boundary, separate from the stale-source boundary.",
+      "format": "int64",
+      "type": "integer"
+    },
+    "warning": {
+      "description": "User-facing warning, or null when within the warning threshold.",
+      "type": [
+        "string",
+        "null"
+      ]
+    }
+  },
+  "required": [
+    "state",
+    "evaluated_at",
+    "max_age_seconds",
+    "warn_age_seconds",
+    "attention_required"
+  ],
+  "type": "object"
+}

Changed3 schema fields changedOct 7, 2026

addedOutput schema / $defs / AwardAvailability

Added value: +{
+  "properties": {
+    "artifact_http_status": {
+      "format": "uint16",
+      "maximum": 65535,
+      "minimum": 0,
+      "type": [
+        "integer",
+        "null"
+      ]
+    },
+    "check_interval_seconds": {
+      "format": "uint64",
+      "minimum": 0,
+      "type": "integer"
+    },
+    "checked_at": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "inventory_http_status": {
+      "format": "uint16",
+      "maximum": 65535,
+      "minimum": 0,
+      "type": [
+        "integer",
+        "null"
+      ]
+    },
+    "latest_release_date": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "latest_release_url": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "max_check_age_seconds": {
+      "format": "int64",
+      "type": "integer"
+    },
+    "state": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "state",
+    "check_interval_seconds",
+    "max_check_age_seconds"
+  ],
+  "type": "object"
+}

addedOutput schema / $defs / AwardFreshness

Added value: +{
+  "properties": {
+    "age_state": {
+      "type": "string"
+    },
+    "age_warning_after_days": {
+      "format": "int64",
+      "type": "integer"
+    },
+    "effective_source_date": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "source_age_days": {
+      "format": "int64",
+      "type": [
+        "integer",
+        "null"
+      ]
+    },
+    "upstream": {
+      "$ref": "#/$defs/AwardAvailability"
+    },
+    "warning": {
+      "type": [
+        "string",
+        "null"
+      ]
+    }
+  },
+  "required": [
+    "age_state",
+    "age_warning_after_days",
+    "upstream"
+  ],
+  "type": "object"
+}

addedOutput schema / $defs / SourceCoverage / properties / award_freshness

Added value: +{
+  "anyOf": [
+    {
+      "$ref": "#/$defs/AwardFreshness"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Award age and latest official release evidence, independent of publication or scheduler state."
+}

Changed1 schema field changedSep 24, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$defs": {
+    "SourceCoverage": {
+      "properties": {
+        "dataset": {
+          "type": "string"
+        },
+        "input_rows": {
+          "format": "int64",
+          "type": "integer"
+        },
+        "public_rows": {
+          "format": "int64",
+          "type": "integer"
+        },
+        "sha256": {
+          "type": "string"
+        },
+        "source_date": {
+          "type": "string"
+        },
+        "source_url": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "dataset",
+        "source_url",
+        "source_date",
+        "sha256",
+        "input_rows",
+        "public_rows"
+      ],
+      "type": "object"
+    }
+  },
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "properties": {
+    "generation": {
+      "type": "string"
+    },
+    "history": {
+      "type": "string"
+    },
+    "sources": {
+      "items": {
+        "$ref": "#/$defs/SourceCoverage"
+      },
+      "type": "array"
+    }
+  },
+  "required": [
+    "generation",
+    "sources",
+    "history"
+  ],
+  "type": "object"
+}

AddedSep 22, 2026

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