Previous value: -"Language for the wikibase:label SERVICE (e.g., \"en\", \"de\"). Controls the language of ?<var>Label variables. Set to \"\" to suppress label SERVICE injection."New value: +"Wikidata language code, or a comma-separated fallback list tried in order (e.g., \"en\", \"de\", \"fr,en\"), for the injected wikibase:label SERVICE — the language of ?<var>Label, ?<var>Description, and ?<var>AltLabel variables. The list falls back to the multilingual (\"mul\") label last unless it already names mul. Case-insensitive; \"_\" is read as \"-\"; blank means \"en\"."

Added value: +"^\\s*(?:[A-Za-z]{2,8}(?:[-_][A-Za-z0-9]{1,9})*(?:\\s*,\\s*[A-Za-z]{2,8}(?:[-_][A-Za-z0-9]{1,9})*)*\\s*)?$"

Previous value: -"SPARQL SELECT query. Must be a SELECT query (not CONSTRUCT/DESCRIBE/ASK). Standard prefixes (wd:, wdt:, p:, ps:, pq:, wikibase:, bd:) are injected automatically. Example: SELECT ?item ?itemLabel WHERE { ?item wdt:P31 wd:Q146. } LIMIT 10"New value: +"SPARQL SELECT query. Any other form — ASK, CONSTRUCT, DESCRIBE, an update, or plain search text — is rejected before it is sent. Standard prefixes (wd:, wdt:, p:, ps:, pq:, wikibase:, bd:, rdfs:, schema:) are injected automatically. Example: SELECT ?item ?itemLabel WHERE { ?item wdt:P31 wd:Q146. } LIMIT 10"

Previous value: -"Machine-readable failure mode. Declared by this tool: `parse_error`: SPARQL syntax error — the query could not be parsed. `timeout`: Query exceeded the client-side timeout. `throttled`: Wikidata SPARQL endpoint is rate-limited (60 req/min, 5 concurrent per IP). Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `not_select_query`: The query is not a SELECT query: an ASK, CONSTRUCT, DESCRIBE, or update form, or plain text. `parse_error`: SPARQL syntax error — the query could not be parsed. `timeout`: Query exceeded the client-side timeout. `throttled`: Wikidata SPARQL endpoint is rate-limited (60 req/min, 5 concurrent per IP). Other values are possible when a failure originates below the handler."

Previous value: -[
-  "parse_error",
-  "timeout",
-  "throttled"
-]New value: +[
+  "not_select_query",
+  "parse_error",
+  "timeout",
+  "throttled"
+]

Previous value: -"Recovery hint when no results returned — suggests checking query logic or broadening filters. Absent on non-empty results."New value: +"Present when the result was cut to fit the response budget (how to page or aggregate for the rest), or when no rows matched (check query logic or broaden filters)."

Previous value: -"Array of result bindings. Each row maps variable names to binding objects with { type, value, \"xml:lang\"?, datatype? } fields."New value: +"Result bindings: every row when the result fits the 64,000-byte response budget, otherwise the leading rows that fit (returnedCount of totalCount). Each row maps variable names to binding objects with { type, value, \"xml:lang\"?, datatype? } fields."

Added value: +{
+  "description": "Number of rows in results — fewer than totalCount when the 64,000-byte response budget cut the result.",
+  "type": "number"
+}

Previous value: -"Number of result rows returned."New value: +"Number of rows the query produced, before any response-budget cut."

Previous value: -"True when the row count equals 10,000 — the Wikidata/Blazegraph server-side cap — indicating the result set was likely truncated. False otherwise. Add a LIMIT clause to avoid hitting the cap. Note: the SPARQL endpoint does not expose an explicit truncation flag; this is an inferred signal."New value: +"True when the query produced 10,000 rows (totalCount) — the Wikidata/Blazegraph server-side cap — indicating the result set was likely truncated upstream. False otherwise. Add a LIMIT clause to avoid hitting the cap. Independent of the response-budget cut, which returnedCount reports. Note: the SPARQL endpoint does not expose an explicit truncation flag; this is an inferred signal."

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +false

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "results",
+      "variables",
+      "truncated",
+      "totalCount"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "additionalProperties": {},
+  "description": "Present when the call failed. Absent on success.",
+  "properties": {
+    "code": {
+      "description": "JSON-RPC error code for this failure.",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "data": {
+      "additionalProperties": {},
+      "properties": {
+        "reason": {
+          "description": "Machine-readable failure mode. Declared by this tool: `parse_error`: SPARQL syntax error — the query could not be parsed. `timeout`: Query exceeded the client-side timeout. `throttled`: Wikidata SPARQL endpoint is rate-limited (60 req/min, 5 concurrent per IP). Other values are possible when a failure originates below the handler.",
+          "examples": [
+            "parse_error",
+            "timeout",
+            "throttled"
+          ],
+          "type": "string"
+        },
+        "recovery": {
+          "additionalProperties": {},
+          "description": "Actionable next step for the caller.",
+          "properties": {
+            "hint": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "hint"
+          ],
+          "type": "object"
+        },
+        "retryable": {
+          "description": "Whether retrying may succeed.",
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "message": {
+      "description": "Human-readable description of what went wrong.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "code",
+    "message"
+  ],
+  "type": "object"
+}

Removed value: -[
-  "results",
-  "variables",
-  "truncated",
-  "totalCount"
-]

Previous value: -"True when the endpoint returned a partial result set due to server-side memory limits. False when the full result was returned. Add a LIMIT clause to avoid truncation on large queries."New value: +"True when the row count equals 10,000 — the Wikidata/Blazegraph server-side cap — indicating the result set was likely truncated. False otherwise. Add a LIMIT clause to avoid hitting the cap. Note: the SPARQL endpoint does not expose an explicit truncation flag; this is an inferred signal."

Added value: +{
+  "description": "Recovery hint when no results returned — suggests checking query logic or broadening filters. Absent on non-empty results.",
+  "type": "string"
+}

Removed value: -{
-  "description": "Number of result rows.",
-  "type": "number"
-}

Added value: +{
+  "description": "Number of result rows returned.",
+  "type": "number"
+}

Previous value: -[
-  "results",
-  "variables",
-  "rowCount",
-  "truncated"
-]New value: +[
+  "results",
+  "variables",
+  "truncated",
+  "totalCount"
+]