Previous value: -"One or more Met object IDs to fetch. Maximum 20 per call. IDs come from met_search_collections or met_list_objects. A repeated ID is fetched and returned once, at its first position. Partial failures are reported per ID rather than failing the whole batch."New value: +"One or more Met object IDs to fetch, up to 500 — a full met_search_collections or met_list_objects page. A repeated ID is fetched and returned once, at its first position. The first 20 distinct IDs are fetched; the rest come back unrequested in remainingIDs. Partial failures are reported per ID rather than failing the whole batch."

Previous value: -20New value: +500

Previous value: -"Machine-readable failure mode. Declared by this tool: `all_not_found`: Every requested objectID returned a 404 — all IDs are stale or invalid. `all_failed`: No object was fetched, no failure was a firewall block or a 500/502/503/504 outage, and the failures were neither all 404s nor all time-budget expiries — network errors, other HTTP errors, or 404s beside expiries. `upstream_blocked`: No object was fetched and the Met API's firewall refused requests with HTTP 403 — it blocks this server's address, not one object. `upstream_unavailable`: No object was fetched and a fetch exhausted its retries on HTTP 500, 502, 503, or 504 — an outage on the Met API's side, not a problem with the IDs. `retry_deadline_exceeded`: No object was fetched and every fetch ran out of the call's time budget, retries and backoff included — an ID whose fetch would have started after the budget was spent counts too. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `all_not_found`: Every requested objectID returned a 404 — all IDs are stale or invalid. `all_failed`: No object was fetched, no failure was a firewall block, an HTTP 429 rate limit, or a 500/502/503/504 outage, and the failures were neither all 404s nor all time-budget expiries — network errors, other HTTP errors, or 404s beside expiries. `upstream_blocked`: No object was fetched and the Met API's firewall refused requests with HTTP 403 — it blocks this server's address, not one object. `upstream_rate_limited`: No object was fetched and the Met API answered HTTP 429 until a fetch's retries ran out, or asked for a wait longer than the retries or the call's time budget allow — it throttles this server's address, not one object. `upstream_unavailable`: No object was fetched and a fetch exhausted its retries on HTTP 500, 502, 503, or 504 — an outage on the Met API's side, not a problem with the IDs. `retry_deadline_exceeded`: No object was fetched and every fetch ran out of the call's time budget, retries and backoff included — an ID whose fetch would have started after the budget was spent counts too. Other values are possible when a failure originates below the handler."

Previous value: -[
-  "all_not_found",
-  "all_failed",
-  "upstream_blocked",
-  "upstream_unavailable",
-  "retry_deadline_exceeded"
-]New value: +[
+  "all_not_found",
+  "all_failed",
+  "upstream_blocked",
+  "upstream_rate_limited",
+  "upstream_unavailable",
+  "retry_deadline_exceeded"
+]

Previous value: -"Image outcome for each record in objects[], in request order; deferred and failed IDs get no entry. Present only when includeImages is true."New value: +"Image outcome for each record in objects[], in request order; deferred, failed, and remainingIDs get no entry. Present only when includeImages is true."

Previous value: -"How to retrieve the deferred records, with the budget applied. Present only when the batch byte budget deferred a record."New value: +"Present when the call held more than 20 distinct object IDs, or when the batch byte budget deferred a record; both apply as one string, the remainingIDs sentence first. Past the cap it says how many IDs were requested and that the rest are in remainingIDs; for deferred records, how to retrieve them, with the budget applied."

Added value: +{
+  "description": "Print series or portfolio the object belongs to, with its plate or number (e.g., \"Birds of America, plate LXXI\"). Often empty.",
+  "type": "string"
+}

Added value: +{
+  "description": "Reign the object dates to, for applicable cultures (e.g., \"Joint reign of Hatshepsut and Thutmose III\"). Often empty.",
+  "type": "string"
+}

Previous value: -[
-  "objectID",
-  "title",
-  "isPublicDomain",
-  "hasCC0Image",
-  "primaryImage",
-  "primaryImageSmall",
-  "additionalImages",
-  "objectURL",
-  "department",
-  "departmentId",
-  "objectName",
-  "classification",
-  "isHighlight",
-  "isTimelineWork",
-  "artistPrefix",
-  "artistDisplayName",
-  "artistSuffix",
-  "artistRole",
-  "artistDisplayBio",
-  "artistNationality",
-  "artistBeginDate",
-  "artistEndDate",
-  "constituents",
-  "objectDate",
-  "objectBeginDate",
-  "objectEndDate",
-  "medium",
-  "dimensions",
-  "culture",
-  "period",
-  "dynasty",
-  "accessionNumber",
-  "accessionYear",
-  "creditLine",
-  "rightsAndReproduction",
-  "country",
-  "region",
-  "geography",
-  "measurements",
-  "tags",
-  "objectWikidata_URL",
-  "GalleryNumber",
-  "metadataDate"
-]New value: +[
+  "objectID",
+  "title",
+  "isPublicDomain",
+  "hasCC0Image",
+  "primaryImage",
+  "primaryImageSmall",
+  "additionalImages",
+  "objectURL",
+  "department",
+  "departmentId",
+  "objectName",
+  "classification",
+  "isHighlight",
+  "isTimelineWork",
+  "artistPrefix",
+  "artistDisplayName",
+  "artistSuffix",
+  "artistRole",
+  "artistDisplayBio",
+  "artistNationality",
+  "artistBeginDate",
+  "artistEndDate",
+  "constituents",
+  "objectDate",
+  "objectBeginDate",
+  "objectEndDate",
+  "medium",
+  "dimensions",
+  "culture",
+  "period",
+  "dynasty",
+  "reign",
+  "portfolio",
+  "accessionNumber",
+  "accessionYear",
+  "creditLine",
+  "rightsAndReproduction",
+  "country",
+  "region",
+  "geography",
+  "measurements",
+  "tags",
+  "objectWikidata_URL",
+  "GalleryNumber",
+  "metadataDate"
+]

Added value: +{
+  "description": "The distinct object IDs past the first 20, in request order. These were not requested, unlike deferred[] (fetched, withheld by the byte budget) and the failed[] entries an upstream block, throttle, or outage left unrequested. Re-call met_get_object with them. Absent when the call held 20 or fewer distinct IDs.",
+  "items": {
+    "description": "A distinct object ID past the per-call cap.",
+    "maximum": 9007199254740991,
+    "minimum": -9007199254740991,
+    "type": "integer"
+  },
+  "type": "array"
+}

Added value: +{
+  "default": false,
+  "description": "Also attach the web-display image (primaryImageSmall, about 600 px on the long edge) of the first 3 returned records that have hasCC0Image true, in request order, as image blocks in content[], each after a caption naming its objectID. images[] reports what happened for every returned record. The image bytes ride content[] only, so a client that hands the model only structuredContent will not show the images. Default false: no image is fetched.",
+  "type": "boolean"
+}

Previous value: -"Machine-readable failure mode. Declared by this tool: `all_not_found`: Every requested objectID returned a 404 — all IDs are stale or invalid. `all_failed`: Every requested objectID failed due to network errors or API downtime. `upstream_blocked`: No object was fetched and the Met API's firewall refused requests with HTTP 403 — it blocks this server's address, not one object. `retry_deadline_exceeded`: No object was fetched and every fetch ran out of the call's time budget, retries and backoff included — an ID whose fetch would have started after the budget was spent counts too. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `all_not_found`: Every requested objectID returned a 404 — all IDs are stale or invalid. `all_failed`: No object was fetched, no failure was a firewall block or a 500/502/503/504 outage, and the failures were neither all 404s nor all time-budget expiries — network errors, other HTTP errors, or 404s beside expiries. `upstream_blocked`: No object was fetched and the Met API's firewall refused requests with HTTP 403 — it blocks this server's address, not one object. `upstream_unavailable`: No object was fetched and a fetch exhausted its retries on HTTP 500, 502, 503, or 504 — an outage on the Met API's side, not a problem with the IDs. `retry_deadline_exceeded`: No object was fetched and every fetch ran out of the call's time budget, retries and backoff included — an ID whose fetch would have started after the budget was spent counts too. Other values are possible when a failure originates below the handler."

Previous value: -[
-  "all_not_found",
-  "all_failed",
-  "upstream_blocked",
-  "retry_deadline_exceeded"
-]New value: +[
+  "all_not_found",
+  "all_failed",
+  "upstream_blocked",
+  "upstream_unavailable",
+  "retry_deadline_exceeded"
+]

Added value: +{
+  "description": "Image outcome for each record in objects[], in request order; deferred and failed IDs get no entry. Present only when includeImages is true.",
+  "items": {
+    "additionalProperties": false,
+    "description": "A returned record's image outcome.",
+    "properties": {
+      "objectID": {
+        "description": "Object ID of a returned record.",
+        "maximum": 9007199254740991,
+        "minimum": -9007199254740991,
+        "type": "integer"
+      },
+      "status": {
+        "description": "attached: the image rides content[], after a caption naming the objectID. no_cc0_image: the record has no CC0 image, so nothing was fetched. over_cap: 3 earlier CC0 records took the image slots — request this ID among the first 3 CC0 records of another call to see its image. unavailable: the image host returned no image in time, or the URL was not on the Met image host.",
+        "enum": [
+          "attached",
+          "no_cc0_image",
+          "over_cap",
+          "unavailable"
+        ],
+        "type": "string"
+      }
+    },
+    "required": [
+      "objectID",
+      "status"
+    ],
+    "type": "object"
+  },
+  "type": "array"
+}

Added value: +{
+  "description": "Year the Met acquired the object, as sent (e.g., \"1960\") — occasionally a full date (e.g., \"2005-02-15\"). Can differ from the year in creditLine. Empty when the Met records none.",
+  "type": "string"
+}

Previous value: -"Artist birth year, or a firm's founding year, as a string (e.g., \"1853\"). Occasionally a full date (e.g., \"1928-01-10\"). Empty for anonymous works."New value: +"Birth year of the person artistDisplayName names, or a firm's founding year, as a string (e.g., \"1853\") — that person's even when artistPrefix qualifies the attribution. Occasionally a full date (e.g., \"1928-01-10\"). Empty for anonymous works."

Previous value: -"Primary artist name as displayed (e.g., \"Vincent van Gogh\"). Empty for anonymous or unknown works."New value: +"Name of the person or firm the attribution names (e.g., \"Vincent van Gogh\"), without the qualifier in artistPrefix or the text in artistSuffix — read those and artistRole with it. Empty for anonymous or unknown works."

Previous value: -"Artist death year, or a firm's closing year, as a string (e.g., \"1890\"). Occasionally a full date (e.g., \"1928-01-10\"). Empty for a living artist, a firm still active, or an anonymous work."New value: +"Death year of the person artistDisplayName names, or a firm's closing year, as a string (e.g., \"1890\") — that person's even when artistPrefix qualifies the attribution. Occasionally a full date (e.g., \"1928-01-10\"). Empty for a living artist, a firm still active, or an anonymous work."

Added value: +{
+  "description": "Qualifier the Met places before artistDisplayName (e.g., \"Style of\", \"Workshop of\", \"Attributed to\", \"Published by\"). Read the two together: \"Style of\" with \"Rembrandt\" is a work in Rembrandt's style, not one by him. Empty when the attribution is unqualified.",
+  "type": "string"
+}

Added value: +{
+  "description": "The named person's role for this object (e.g., \"Artist\", \"Maker\", \"Publisher\", \"Patron\") — a patron or publisher is not the maker. Empty when the record names no one.",
+  "type": "string"
+}

Added value: +{
+  "description": "Text the Met places after artistDisplayName (e.g., \"(r. 1876–1909)\", \", Paris\", \"(?)\"). Empty when the Met records none.",
+  "type": "string"
+}

Previous value: -"Curatorial department (e.g., \"European Paintings\", \"Egyptian Art\")."New value: +"Curatorial department as the record names it (e.g., \"European Paintings\", \"Egyptian Art\"). Five departments carry a different name on their records than in met_list_departments — \"The American Wing\", \"The Michael C. Rockefeller Wing\", \"Costume Institute\", \"Robert Lehman Collection\", \"Modern and Contemporary Art\" — so match departments by departmentId, not by name."

Added value: +{
+  "anyOf": [
+    {
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "The department's numeric ID, resolved from department, for the departmentId filter of met_list_objects and met_search_collections. Null when the record's department name was not recognized — never a guess."
+}

Added value: +{
+  "description": "When the Met last created or revised this record: an ISO 8601 UTC timestamp, as sent (e.g., \"2026-10-01T04:59:29.693Z\"; fractional seconds run from none to three digits). Its UTC date is what met_list_objects updatedSince compares, that day included. Empty when the Met sends none.",
+  "type": "string"
+}

Previous value: -"Web-display image URL (~800px; CC0 objects only; empty string for non-public-domain works)."New value: +"Web-display image URL (about 600 px on the long edge; CC0 objects only; empty string for non-public-domain works)."

Added value: +{
+  "description": "Rights holder and reproduction notice (e.g., \"© 2026 Pollock-Krasner Foundation / Artists Rights Society (ARS), New York\"). Most copyrighted records carry none, so an empty value does not make a work free to reuse — isPublicDomain decides that.",
+  "type": "string"
+}

Previous value: -[
-  "objectID",
-  "title",
-  "isPublicDomain",
-  "hasCC0Image",
-  "primaryImage",
-  "primaryImageSmall",
-  "additionalImages",
-  "objectURL",
-  "department",
-  "objectName",
-  "classification",
-  "isHighlight",
-  "isTimelineWork",
-  "artistDisplayName",
-  "artistDisplayBio",
-  "artistNationality",
-  "artistBeginDate",
-  "artistEndDate",
-  "constituents",
-  "objectDate",
-  "objectBeginDate",
-  "objectEndDate",
-  "medium",
-  "dimensions",
-  "culture",
-  "period",
-  "dynasty",
-  "accessionNumber",
-  "creditLine",
-  "country",
-  "region",
-  "geography",
-  "measurements",
-  "tags",
-  "objectWikidata_URL",
-  "GalleryNumber"
-]New value: +[
+  "objectID",
+  "title",
+  "isPublicDomain",
+  "hasCC0Image",
+  "primaryImage",
+  "primaryImageSmall",
+  "additionalImages",
+  "objectURL",
+  "department",
+  "departmentId",
+  "objectName",
+  "classification",
+  "isHighlight",
+  "isTimelineWork",
+  "artistPrefix",
+  "artistDisplayName",
+  "artistSuffix",
+  "artistRole",
+  "artistDisplayBio",
+  "artistNationality",
+  "artistBeginDate",
+  "artistEndDate",
+  "constituents",
+  "objectDate",
+  "objectBeginDate",
+  "objectEndDate",
+  "medium",
+  "dimensions",
+  "culture",
+  "period",
+  "dynasty",
+  "accessionNumber",
+  "accessionYear",
+  "creditLine",
+  "rightsAndReproduction",
+  "country",
+  "region",
+  "geography",
+  "measurements",
+  "tags",
+  "objectWikidata_URL",
+  "GalleryNumber",
+  "metadataDate"
+]

Previous value: -"One or more Met object IDs to fetch. Maximum 20 per call. IDs come from met_search_collections. A repeated ID is fetched and returned once, at its first position. Partial failures are reported per ID rather than failing the whole batch."New value: +"One or more Met object IDs to fetch. Maximum 20 per call. IDs come from met_search_collections or met_list_objects. A repeated ID is fetched and returned once, at its first position. Partial failures are reported per ID rather than failing the whole batch."

Previous value: -"A Met object ID from met_search_collections."New value: +"A Met object ID from met_search_collections or met_list_objects."

Previous value: -"Machine-readable failure mode. Declared by this tool: `all_not_found`: Every requested objectID returned a 404 — all IDs are stale or invalid. `all_failed`: Every requested objectID failed due to network errors or API downtime. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `all_not_found`: Every requested objectID returned a 404 — all IDs are stale or invalid. `all_failed`: Every requested objectID failed due to network errors or API downtime. `upstream_blocked`: No object was fetched and the Met API's firewall refused requests with HTTP 403 — it blocks this server's address, not one object. `retry_deadline_exceeded`: No object was fetched and every fetch ran out of the call's time budget, retries and backoff included — an ID whose fetch would have started after the budget was spent counts too. Other values are possible when a failure originates below the handler."

Previous value: -[
-  "all_not_found",
-  "all_failed"
-]New value: +[
+  "all_not_found",
+  "all_failed",
+  "upstream_blocked",
+  "retry_deadline_exceeded"
+]

Previous value: -"Artist birth year as a string (e.g., \"1853\"). Empty for anonymous works."New value: +"Artist birth year, or a firm's founding year, as a string (e.g., \"1853\"). Occasionally a full date (e.g., \"1928-01-10\"). Empty for anonymous works."

Previous value: -"Artist death year as a string. Empty for living or anonymous."New value: +"Artist death year, or a firm's closing year, as a string (e.g., \"1890\"). Occasionally a full date (e.g., \"1928-01-10\"). Empty for a living artist, a firm still active, or an anonymous work."

Previous value: -"One or more Met object IDs to fetch. Maximum 20 per call. IDs come from met_search_collections. Partial failures are reported per ID rather than failing the whole batch."New value: +"One or more Met object IDs to fetch. Maximum 20 per call. IDs come from met_search_collections. A repeated ID is fetched and returned once, at its first position. Partial failures are reported per ID rather than failing the whole batch."

Added value: +{
+  "description": "Records that were fetched but did not fit the call’s cumulative budget on serialized structuredContent bytes, in request order. Re-call met_get_object with these IDs to retrieve them. Absent when every fetched record fit.",
+  "items": {
+    "additionalProperties": false,
+    "description": "A record fetched successfully but withheld to keep the response bounded.",
+    "properties": {
+      "bytes": {
+        "description": "Serialized structuredContent size of the withheld record — the same scale the budget is measured on — so a follow-up batch can be sized before it is requested.",
+        "maximum": 9007199254740991,
+        "minimum": 0,
+        "type": "integer"
+      },
+      "objectID": {
+        "description": "Object ID whose record was fetched but withheld from this response.",
+        "maximum": 9007199254740991,
+        "minimum": -9007199254740991,
+        "type": "integer"
+      }
+    },
+    "required": [
+      "objectID",
+      "bytes"
+    ],
+    "type": "object"
+  },
+  "type": "array"
+}

Added value: +{
+  "description": "How to retrieve the deferred records, with the budget applied. Present only when the batch byte budget deferred a record.",
+  "type": "string"
+}

Added value: +{
+  "additionalProperties": false,
+  "description": "Findspot detail beyond the top-level country and region, which are not repeated here. Every field is an empty string when the Met records nothing; population concentrates in the archaeological departments.",
+  "properties": {
+    "city": {
+      "description": "City of origin or findspot (e.g., \"Damascus\", \"Constantinople (?)\", \"Springfield\"). The most widely populated field of this block outside the archaeological departments; empty when the Met records no city.",
+      "type": "string"
+    },
+    "county": {
+      "description": "County of origin. Empty on nearly every record.",
+      "type": "string"
+    },
+    "excavation": {
+      "description": "Excavation that recovered the object (e.g., \"MMA excavations, 1928-29\"). Excavated objects only.",
+      "type": "string"
+    },
+    "geographyType": {
+      "description": "How the object relates to the place (e.g., \"From\", \"Original\", \"Probably originally from\"). Empty when the Met records no findspot.",
+      "type": "string"
+    },
+    "locale": {
+      "description": "Named place within the site (e.g., \"Late Period cemetery, Tomb of Harkhebit\"). Excavated objects only.",
+      "type": "string"
+    },
+    "locus": {
+      "description": "Specific findspot within the locale (e.g., \"burial chamber\"). Excavated objects only.",
+      "type": "string"
+    },
+    "river": {
+      "description": "Associated river. Empty on nearly every record.",
+      "type": "string"
+    },
+    "state": {
+      "description": "State or province of origin (e.g., \"Massachusetts\"). Sparse, and concentrated in departments that catalogue a manufacturing place. Empty when the Met records none.",
+      "type": "string"
+    },
+    "subregion": {
+      "description": "Sub-region or site within the region (e.g., \"Saqqara\", \"Deir el-Bahri\"). Commonly populated for archaeological departments, empty elsewhere.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "geographyType",
+    "city",
+    "state",
+    "county",
+    "subregion",
+    "locale",
+    "locus",
+    "excavation",
+    "river"
+  ],
+  "type": "object"
+}

Added value: +{
+  "anyOf": [
+    {
+      "items": {
+        "additionalProperties": false,
+        "description": "One measured element of the object.",
+        "properties": {
+          "elementDescription": {
+            "description": "Qualifier distinguishing this element from a sibling with the same name (e.g., \"Print\" vs \"Negativ\"). Empty when the Met records none.",
+            "type": "string"
+          },
+          "elementMeasurements": {
+            "additionalProperties": {
+              "description": "Measured value — centimeters for spatial axes, kilograms for weight.",
+              "type": "number"
+            },
+            "description": "Measured axes for this element. Which keys are present varies element to element, so read the keys rather than assuming a fixed set. Empty object when the Met records no values.",
+            "propertyNames": {
+              "description": "Measurement axis (e.g., \"Height\", \"Width\", \"Depth\", \"Length\").",
+              "type": "string"
+            },
+            "type": "object"
+          },
+          "elementName": {
+            "description": "Which part of the object was measured (e.g., \"Overall\", \"Other\", \"Length\").",
+            "type": "string"
+          }
+        },
+        "required": [
+          "elementName",
+          "elementDescription",
+          "elementMeasurements"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Structured element measurements — the numeric counterpart to the formatted dimensions string. Null when the Met records none."
+}

Previous value: -[
-  "objectID",
-  "title",
-  "isPublicDomain",
-  "hasCC0Image",
-  "primaryImage",
-  "primaryImageSmall",
-  "additionalImages",
-  "objectURL",
-  "department",
-  "objectName",
-  "classification",
-  "isHighlight",
-  "isTimelineWork",
-  "artistDisplayName",
-  "artistDisplayBio",
-  "artistNationality",
-  "artistBeginDate",
-  "artistEndDate",
-  "constituents",
-  "objectDate",
-  "objectBeginDate",
-  "objectEndDate",
-  "medium",
-  "dimensions",
-  "culture",
-  "period",
-  "dynasty",
-  "accessionNumber",
-  "creditLine",
-  "country",
-  "region",
-  "tags",
-  "objectWikidata_URL",
-  "GalleryNumber"
-]New value: +[
+  "objectID",
+  "title",
+  "isPublicDomain",
+  "hasCC0Image",
+  "primaryImage",
+  "primaryImageSmall",
+  "additionalImages",
+  "objectURL",
+  "department",
+  "objectName",
+  "classification",
+  "isHighlight",
+  "isTimelineWork",
+  "artistDisplayName",
+  "artistDisplayBio",
+  "artistNationality",
+  "artistBeginDate",
+  "artistEndDate",
+  "constituents",
+  "objectDate",
+  "objectBeginDate",
+  "objectEndDate",
+  "medium",
+  "dimensions",
+  "culture",
+  "period",
+  "dynasty",
+  "accessionNumber",
+  "creditLine",
+  "country",
+  "region",
+  "geography",
+  "measurements",
+  "tags",
+  "objectWikidata_URL",
+  "GalleryNumber"
+]

Added value: +[
+  {
+    "maximum": 9007199254740991,
+    "minimum": -9007199254740991,
+    "type": "integer"
+  },
+  {
+    "type": "null"
+  }
+]

Previous value: -"Earliest date as an integer year (negative = BCE)."New value: +"Earliest date as an integer year (negative = BCE). Null when the Met has no machine-readable date for the work — read objectDate for what is known instead, and do not treat null as year zero or substitute a default."

Removed value: -9007199254740991

Removed value: --9007199254740991

Removed value: -"integer"

Added value: +[
+  {
+    "maximum": 9007199254740991,
+    "minimum": -9007199254740991,
+    "type": "integer"
+  },
+  {
+    "type": "null"
+  }
+]

Previous value: -"Latest date as an integer year (negative = BCE)."New value: +"Latest date as an integer year (negative = BCE). Null under the same condition as objectBeginDate — the two are null together."

Removed value: -9007199254740991

Removed value: --9007199254740991

Removed value: -"integer"

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": [
+      "objects",
+      "failed"
+    ]
+  },
+  {
+    "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: `all_not_found`: Every requested objectID returned a 404 — all IDs are stale or invalid. `all_failed`: Every requested objectID failed due to network errors or API downtime. Other values are possible when a failure originates below the handler.",
+          "examples": [
+            "all_not_found",
+            "all_failed"
+          ],
+          "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: -[
-  "objects",
-  "failed"
-]

Previous value: -"One or more Met object IDs to fetch. Maximum 20 per call. IDs come from met_search_collections. Fetches run in parallel (concurrency-limited); partial failures are reported per ID rather than failing the whole batch."New value: +"One or more Met object IDs to fetch. Maximum 20 per call. IDs come from met_search_collections. Partial failures are reported per ID rather than failing the whole batch."

Previous value: -"Earliest date as an integer year (negative = BCE). Use for date range comparisons."New value: +"Earliest date as an integer year (negative = BCE)."

Previous value: -"One or more Met object IDs to fetch. Maximum 20 per call. IDs come from met_search. Fetches run in parallel (concurrency-limited); partial failures are reported per ID rather than failing the whole batch."New value: +"One or more Met object IDs to fetch. Maximum 20 per call. IDs come from met_search_collections. Fetches run in parallel (concurrency-limited); partial failures are reported per ID rather than failing the whole batch."

Previous value: -"A Met object ID from met_search."New value: +"A Met object ID from met_search_collections."

Previous value: -"True when a CC0 open-access image URL is available (primaryImage is non-empty). Distinct from met_search's hasImages filter, which matches objects that have any image including copyrighted works."New value: +"True when a CC0 open-access image URL is available (primaryImage is non-empty). Distinct from met_search_collections's hasImages filter, which matches objects that have any image including copyrighted works."

Added value: +{
+  "description": "True when a CC0 open-access image URL is available (primaryImage is non-empty). Distinct from met_search's hasImages filter, which matches objects that have any image including copyrighted works.",
+  "type": "boolean"
+}

Removed value: -{
-  "description": "True when primaryImage is non-empty.",
-  "type": "boolean"
-}

Previous value: -[
-  "objectID",
-  "title",
-  "isPublicDomain",
-  "hasImages",
-  "primaryImage",
-  "primaryImageSmall",
-  "additionalImages",
-  "objectURL",
-  "department",
-  "objectName",
-  "classification",
-  "isHighlight",
-  "isTimelineWork",
-  "artistDisplayName",
-  "artistDisplayBio",
-  "artistNationality",
-  "artistBeginDate",
-  "artistEndDate",
-  "constituents",
-  "objectDate",
-  "objectBeginDate",
-  "objectEndDate",
-  "medium",
-  "dimensions",
-  "culture",
-  "period",
-  "dynasty",
-  "accessionNumber",
-  "creditLine",
-  "country",
-  "region",
-  "tags",
-  "objectWikidata_URL",
-  "GalleryNumber"
-]New value: +[
+  "objectID",
+  "title",
+  "isPublicDomain",
+  "hasCC0Image",
+  "primaryImage",
+  "primaryImageSmall",
+  "additionalImages",
+  "objectURL",
+  "department",
+  "objectName",
+  "classification",
+  "isHighlight",
+  "isTimelineWork",
+  "artistDisplayName",
+  "artistDisplayBio",
+  "artistNationality",
+  "artistBeginDate",
+  "artistEndDate",
+  "constituents",
+  "objectDate",
+  "objectBeginDate",
+  "objectEndDate",
+  "medium",
+  "dimensions",
+  "culture",
+  "period",
+  "dynasty",
+  "accessionNumber",
+  "creditLine",
+  "country",
+  "region",
+  "tags",
+  "objectWikidata_URL",
+  "GalleryNumber"
+]