gutenberg-mcp-server

Previous value: -"Literal prefix of a format MIME key, such as \"text/plain\" or \"text/html\". Blank means unset."New value: +"Literal prefix of a format MIME key, such as \"text/plain\" or \"application/pdf\". Type and subtype casing is normalized; parameter suffixes retain literal case. Blank means unset."

Previous value: -"True for non-Sound records with UTF-8 plain text or HTML supported by gutenberg_get_text."New value: +"Eligible Text record with UTF-8 plain text, or HTML without audio formats. Does not guarantee the mirror file exists."

Previous value: -"Literal prefix of a format MIME key, such as \"text/plain\" or \"text/html\". Blank means unset."New value: +"Literal prefix of a format MIME key, such as \"text/plain\" or \"application/pdf\". Type and subtype casing is normalized; parameter suffixes retain literal case. Blank means unset."

Previous value: -"Every nonblank word must occur in the title or an author name, case-insensitively, as a literal substring. More than four words require the local mirror; live fallback rejects longer queries. Whitespace separates words."New value: +"Every nonblank word must occur in the title or an author name as a literal substring. The local mirror ignores case and accents; live matching is upstream-defined. More than four words require the local mirror. Whitespace separates words."

Previous value: -"Case-insensitive phrase in a subject or bookshelf; blank means unset."New value: +"Phrase in a subject or bookshelf, ignoring case and, on the local mirror, accents; blank means unset."

Previous value: -"Every nonblank word must occur in a translator name, case-insensitively, as a literal substring. Requires the local mirror. Whitespace separates words."New value: +"Every nonblank word must occur in a translator name as a literal substring, ignoring case and accents. Requires the local mirror. Whitespace separates words."

Previous value: -"Literal prefix of a format MIME key, such as \"text/plain\" or \"text/html\". Blank means unset."New value: +"Literal prefix of a format MIME key, such as \"text/plain\" or \"application/pdf\". Type and subtype casing is normalized; parameter suffixes retain literal case. Blank means unset."

Previous value: -"Every nonblank word must occur in the title or an author name, case-insensitively, as a literal substring. More than four words require the local mirror; live fallback rejects longer queries. Whitespace separates words."New value: +"Every nonblank word must occur in the title or an author name as a literal substring. The local mirror ignores case and accents; live matching is upstream-defined. More than four words require the local mirror. Whitespace separates words."

Previous value: -"Case-insensitive phrase in a subject or bookshelf; blank means unset."New value: +"Phrase in a subject or bookshelf, ignoring case and, on the local mirror, accents; blank means unset."

Previous value: -"Every nonblank word must occur in a translator name, case-insensitively, as a literal substring. Requires the local mirror. Whitespace separates words."New value: +"Every nonblank word must occur in a translator name as a literal substring, ignoring case and accents. Requires the local mirror. Whitespace separates words."

Previous value: -"True for non-Sound records with a supported UTF-8 plain-text or HTML format for gutenberg_get_text."New value: +"Eligible Text record with UTF-8 plain text, or HTML without audio formats. Does not guarantee the mirror file exists."

Previous value: -"Every summary Gutendex holds for this work, in upstream order. Usually one; some records carry a long and a short variant. Empty when there are none."New value: +"Every source-provided summary: sorted on the RDF mirror, upstream order on live fallback. Empty when there are none."

Previous value: -"First entry of summaries — the primary auto-generated summary of the work, or null when Gutendex has none."New value: +"First entry of summaries, not necessarily primary, or null when the source has none."

Previous value: -"Requested maximum characters. Default 20,000 (~4–5 pages of prose); requests above 50,000 are capped locally at 50,000. Paragraph-boundary trimming may return less than the applied limit — use length for continuation. Trimming never cuts before a find match ends."New value: +"Requested maximum characters. Default 20,000; requests above 50,000 are capped locally at 50,000. Paragraph-boundary trimming may return less than the applied limit — use length for continuation. Trimming never cuts before a find match ends."

Previous value: -"Machine-readable failure mode. Declared by this tool: `text_file_not_found`: The catalog entry exists but its mirror text file returned HTTP 404. `text_fetch_rejected`: The mirror permanently rejected this text request. `invalid_text_response`: The mirror returned an empty document, HTML on a plain-text path, or recognizable server failure document. `not_found`: No book exists with the given ID. `audio_book`: The book is an audio recording (media_type \"Sound\"), not a text book — no literary plain text is available. `no_text_format`: The book has no UTF-8 plain-text or HTML edition available to read (for example an older ASCII-only entry). `offset_out_of_range`: The offset is greater than or equal to totalChars (past the end of the book). `passage_not_found`: find has no occurrence at or after offset. `text_fetch_failed`: The Gutenberg mirror had a transient failure or did not respond within the request budget. `catalog_unavailable`: The catalog lookup that precedes reading a book did not answer within the time this server allows. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `text_file_not_found`: The catalog entry exists but its mirror text file returned HTTP 404. `text_fetch_rejected`: The mirror permanently rejected this text request. `invalid_text_response`: The mirror returned an empty document, HTML on a plain-text path, or recognizable server failure document. `not_found`: No book exists with the given ID. `audio_book`: The book is an audio recording (media_type \"Sound\"), not a text book — no literary plain text is available. `no_text_format`: The book has no UTF-8 plain-text or HTML edition available to read (for example an ASCII-only or PDF/TeX-only entry). `offset_out_of_range`: The offset is greater than or equal to totalChars (past the end of the book). `passage_not_found`: find has no occurrence at or after offset. `text_fetch_failed`: The Gutenberg mirror had a transient failure or the download did not finish within the remaining upstream allowance. `catalog_unavailable`: The catalog lookup that precedes reading a book did not answer within the time this server allows. Other values are possible when a failure originates below the handler."

Previous value: -"Literal prefix of a format MIME key, such as \"text/plain\" or \"text/html\". Blank means unset."New value: +"Literal prefix of a format MIME key, such as \"text/plain\" or \"application/pdf\". Type and subtype casing is normalized; parameter suffixes retain literal case. Blank means unset."

Previous value: -"Every nonblank whitespace-separated word must match title or author name as a case-insensitive literal substring. More than four words require the local mirror; live fallback rejects longer queries. Example: \"dickens expectations\" matches Great Expectations."New value: +"Every nonblank whitespace-separated word must match title or author name as a literal substring. The local mirror ignores case and accents; live fallback may require accents and rejects more than four words. Example: \"dickens expectations\" matches Great Expectations."

Previous value: -"Case-insensitive phrase to match against subjects and bookshelves. Example: \"detective\" returns books on the \"Detective and Mystery Stories\" bookshelf. Separate from query — topic searches categorization metadata, not title/author."New value: +"Phrase to match against subjects and bookshelves, ignoring case and, on the local mirror, accents. Example: \"detective\" matches the \"Detective Fiction\" bookshelf and \"Detective and mystery stories\" subject. Separate from query — topic searches categorization metadata, not title/author."

Previous value: -"Every nonblank whitespace-separated word must match a translator name as a case-insensitive literal substring; words can land on different translators of one book, and accents must match. Requires the local mirror. Example: \"maude\" finds the Aylmer and Louise Maude translations. Result rows omit translators; gutenberg_get_book reports them."New value: +"Every nonblank whitespace-separated word must match a translator name as a literal substring, ignoring case and accents; words can land on different translators of one book. Requires the local mirror. Example: \"maude\" finds the Aylmer and Louise Maude translations. Result rows omit translators; gutenberg_get_book reports them."

Previous value: -"True for non-Sound records with UTF-8 plain text or HTML supported by gutenberg_get_text."New value: +"Eligible Text record with UTF-8 plain text, or HTML without audio formats. Does not guarantee the mirror file exists."

Previous value: -"Literal prefix of a format MIME key, such as \"text/plain\" or \"text/html\". Blank means unset."New value: +"Literal prefix of a format MIME key, such as \"text/plain\" or \"application/pdf\". Type and subtype casing is normalized; parameter suffixes retain literal case. Blank means unset."

Previous value: -"Every nonblank word must occur in the title or an author name, case-insensitively, as a literal substring. More than four words require the local mirror; live fallback rejects longer queries. Whitespace separates words."New value: +"Every nonblank word must occur in the title or an author name as a literal substring. The local mirror ignores case and accents; live matching is upstream-defined. More than four words require the local mirror. Whitespace separates words."

Previous value: -"Case-insensitive phrase in a subject or bookshelf; blank means unset."New value: +"Phrase in a subject or bookshelf, ignoring case and, on the local mirror, accents; blank means unset."

Previous value: -"Every nonblank word must occur in a translator name, case-insensitively, as a literal substring. Requires the local mirror. Whitespace separates words."New value: +"Every nonblank word must occur in a translator name as a literal substring, ignoring case and accents. Requires the local mirror. Whitespace separates words."

Previous value: -"Restrict to books in these languages (two-character ISO 639-1 codes). Example: [\"en\"] for English only, [\"de\", \"fr\"] for German or French. Omit for all languages."New value: +"Restrict to books in these catalog language codes, exactly as results report them (\"en\", not \"eng\"). Example: [\"en\"] for English only, [\"de\", \"fr\"] for German or French, [\"ang\"] for Old English. Omit for all languages."

Previous value: -2New value: +3

Previous value: -"At least one author has a birth or death year on or before this year (CE positive, BCE negative)."New value: +"An author has a known birth or death year on or before this year (CE positive, BCE negative). With author_year_start, one author must meet both bounds."

Previous value: -"At least one author has a birth or death year on or after this year (CE positive, BCE negative)."New value: +"An author has a known birth or death year on or after this year (CE positive, BCE negative). With author_year_end, one author must meet both bounds."

Previous value: -"Any listed two-character ISO 639-1 language code; empty means all languages."New value: +"Any listed two- or three-letter catalog language code; empty means all languages."

Previous value: -2New value: +3

Added value: +{
+  "description": "Every nonblank word must occur in a translator name, case-insensitively, as a literal substring. Requires the local mirror. Whitespace separates words.",
+  "type": "string"
+}

Previous value: -"At least one author has a birth or death year on or before this year (CE positive, BCE negative)."New value: +"An author has a known birth or death year on or before this year (CE positive, BCE negative). With author_year_start, one author must meet both bounds."

Previous value: -"At least one author has a birth or death year on or after this year (CE positive, BCE negative)."New value: +"An author has a known birth or death year on or after this year (CE positive, BCE negative). With author_year_end, one author must meet both bounds."

Previous value: -"Any listed two-character ISO 639-1 language code; empty means all languages."New value: +"Any listed two- or three-letter catalog language code; empty means all languages."

Previous value: -2New value: +3

Added value: +{
+  "description": "Every nonblank word must occur in a translator name, case-insensitively, as a literal substring. Requires the local mirror. Whitespace separates words.",
+  "type": "string"
+}

Previous value: -"Two-character language codes for this edition."New value: +"Catalog language codes for this edition."

Added value: +{
+  "description": "A passage to locate instead of paging to it: the response starts at the first occurrence at or after offset and adds match, and an absent passage fails with passage_not_found rather than returning other text. Matching ignores letter case and whitespace around find. Any run of spaces, tabs, or line breaks matches any other such run, so a hard-wrapped line still matches. Straight and curly quotes match each other. Accents count: \"cafe\" does not match \"café\". Everything else is literal, with no wildcards or patterns, so an italic word stored as _word_ needs its underscores. A blank find is an ordinary read.",
+  "type": "string"
+}

Previous value: -"Requested maximum characters. Default 20,000 (~4–5 pages of prose); requests above 50,000 are capped locally at 50,000. Paragraph-boundary trimming may return less than the applied limit — use length for continuation."New value: +"Requested maximum characters. Default 20,000 (~4–5 pages of prose); requests above 50,000 are capped locally at 50,000. Paragraph-boundary trimming may return less than the applied limit — use length for continuation. Trimming never cuts before a find match ends."

Previous value: -"Character offset into the stripped literary text at which to start reading. 0 returns the beginning of the work. To read subsequent chunks, use offset = prior_offset + prior_length (the length field from the previous response — NOT offset + limit, because the actual returned length may be slightly less than limit due to paragraph-boundary trimming)."New value: +"Character offset into the stripped literary text at which to start reading. 0 returns the beginning of the work. To read subsequent chunks, use offset = prior_offset + prior_length (the length field from the previous response — NOT offset + limit, because the actual returned length may be slightly less than limit due to paragraph-boundary trimming). With find, the search starts here and the returned chunk starts at the match."

Previous value: -"Machine-readable failure mode. Declared by this tool: `text_file_not_found`: The catalog entry exists but its mirror text file returned HTTP 404. `text_fetch_rejected`: The mirror permanently rejected this text request. `invalid_text_response`: The mirror returned an empty document, HTML on a plain-text path, or recognizable server failure document. `not_found`: No book exists with the given ID. `audio_book`: The book is an audio recording (media_type \"Sound\"), not a text book — no literary plain text is available. `no_text_format`: The book has no UTF-8 plain-text or HTML edition available to read (for example an older ASCII-only entry). `offset_out_of_range`: The offset is greater than or equal to totalChars (past the end of the book). `text_fetch_failed`: The Gutenberg mirror had a transient failure or did not respond within the request budget. `catalog_unavailable`: The catalog lookup that precedes reading a book did not answer within the time this server allows. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `text_file_not_found`: The catalog entry exists but its mirror text file returned HTTP 404. `text_fetch_rejected`: The mirror permanently rejected this text request. `invalid_text_response`: The mirror returned an empty document, HTML on a plain-text path, or recognizable server failure document. `not_found`: No book exists with the given ID. `audio_book`: The book is an audio recording (media_type \"Sound\"), not a text book — no literary plain text is available. `no_text_format`: The book has no UTF-8 plain-text or HTML edition available to read (for example an older ASCII-only entry). `offset_out_of_range`: The offset is greater than or equal to totalChars (past the end of the book). `passage_not_found`: find has no occurrence at or after offset. `text_fetch_failed`: The Gutenberg mirror had a transient failure or did not respond within the request budget. `catalog_unavailable`: The catalog lookup that precedes reading a book did not answer within the time this server allows. Other values are possible when a failure originates below the handler."

Previous value: -[
-  "text_file_not_found",
-  "text_fetch_rejected",
-  "invalid_text_response",
-  "not_found",
-  "audio_book",
-  "no_text_format",
-  "offset_out_of_range",
-  "text_fetch_failed",
-  "catalog_unavailable"
-]New value: +[
+  "text_file_not_found",
+  "text_fetch_rejected",
+  "invalid_text_response",
+  "not_found",
+  "audio_book",
+  "no_text_format",
+  "offset_out_of_range",
+  "passage_not_found",
+  "text_fetch_failed",
+  "catalog_unavailable"
+]

Previous value: -"True if there is more text after this chunk. When true, call again with offset = offset + length."New value: +"True if there is more text after this chunk. When true, call again with offset = offset + length and no find."

Added value: +{
+  "additionalProperties": false,
+  "description": "Where find matched. Absent on a read without find.",
+  "properties": {
+    "laterMatches": {
+      "description": "Non-overlapping occurrences after this one. While above 0, repeat the same find with offset = match.offset + match.length for the next.",
+      "type": "number"
+    },
+    "length": {
+      "description": "Characters the match spans in the stored text. Can differ from the length of find, since a whitespace run matches a run of any length.",
+      "type": "number"
+    },
+    "offset": {
+      "description": "Start of the match, in the same coordinates as offset and totalChars.",
+      "type": "number"
+    }
+  },
+  "required": [
+    "offset",
+    "length",
+    "laterMatches"
+  ],
+  "type": "object"
+}

Previous value: -"Character offset where this chunk begins."New value: +"Character offset where this chunk begins: the match start when find matched."

Previous value: -"Include only books with at least one author alive on or before this year. Example: author_year_start=1800 with author_year_end=1899 returns books with 19th-century authors."New value: +"Include only books with an author who has a known birth or death year on or before this year. With author_year_start, one author must meet both bounds. Example: author_year_start=1800 with author_year_end=1899 returns books with 19th-century authors."

Previous value: -"Include only books with at least one author alive on or after this year (positive = CE, negative = BCE). Combine with author_year_end for a range."New value: +"Include only books with an author who has a known birth or death year on or after this year (positive = CE, negative = BCE). With author_year_end, one author must meet both bounds."

Previous value: -"Filter to books in any of these two-character ISO 639-1 language codes. Example: [\"en\"] for English, [\"fr\", \"de\"] for French or German."New value: +"Filter to books in any of these catalog language codes, exactly as results report them (\"en\", not \"eng\"). Example: [\"en\"] for English, [\"fr\", \"de\"] for French or German, [\"enm\"] for Middle English."

Previous value: -2New value: +3

Added value: +{
+  "description": "Every nonblank whitespace-separated word must match a translator name as a case-insensitive literal substring; words can land on different translators of one book, and accents must match. Requires the local mirror. Example: \"maude\" finds the Aylmer and Louise Maude translations. Result rows omit translators; gutenberg_get_book reports them.",
+  "type": "string"
+}

Previous value: -"Two-character language codes for this edition."New value: +"Catalog language codes for this edition."

Previous value: -"At least one author has a birth or death year on or before this year (CE positive, BCE negative)."New value: +"An author has a known birth or death year on or before this year (CE positive, BCE negative). With author_year_start, one author must meet both bounds."

Previous value: -"At least one author has a birth or death year on or after this year (CE positive, BCE negative)."New value: +"An author has a known birth or death year on or after this year (CE positive, BCE negative). With author_year_end, one author must meet both bounds."

Previous value: -"Any listed two-character ISO 639-1 language code; empty means all languages."New value: +"Any listed two- or three-letter catalog language code; empty means all languages."

Previous value: -2New value: +3

Added value: +{
+  "description": "Every nonblank word must occur in a translator name, case-insensitively, as a literal substring. Requires the local mirror. Whitespace separates words.",
+  "type": "string"
+}

Previous value: -"Machine-readable failure mode. Declared by this tool: `query_requires_mirror`: More than four query words were supplied while the local mirror could not answer. `page_out_of_range`: The requested page number is past the last page of results for this query. `catalog_unavailable`: The Project Gutenberg catalog did not answer within the time this server allows for one search. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `translator_requires_mirror`: A translator filter was supplied while the local mirror could not answer. `query_requires_mirror`: More than four query words were supplied while the local mirror could not answer. `page_out_of_range`: The requested page number is past the last page of results for this query. `catalog_unavailable`: The Project Gutenberg catalog did not answer within the time this server allows for one search. Other values are possible when a failure originates below the handler."

Previous value: -[
-  "query_requires_mirror",
-  "page_out_of_range",
-  "catalog_unavailable"
-]New value: +[
+  "translator_requires_mirror",
+  "query_requires_mirror",
+  "page_out_of_range",
+  "catalog_unavailable"
+]

Previous value: -"Actionable guidance for an empty selection."New value: +"Actionable guidance for an empty selection, or a caveat that the live catalog checked author_year_start and author_year_end separately. The caveat can accompany results."

Added value: +{
+  "description": "Any selected source copyright status: \"true\" copyrighted, \"false\" public domain in the USA, \"null\" unknown. Empty means all statuses; this is not worldwide legal clearance.",
+  "items": {
+    "enum": [
+      "true",
+      "false",
+      "null"
+    ],
+    "type": "string"
+  },
+  "type": "array"
+}

Added value: +{
+  "description": "Literal prefix of a format MIME key, such as \"text/plain\" or \"text/html\". Blank means unset.",
+  "type": "string"
+}

Previous value: -[
-  {
-    "not": {
-      "required": [
-        "error"
-      ]
-    },
-    "required": [
-      "requestedLimit",
-      "appliedLimit",
-      "books",
-      "totalInCatalog",
-      "truncated",
-      "shown",
-      "cap"
-    ]
-  },
-  {
-    "required": [
-      "error"
-    ]
-  }
-]New value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "requestedLimit",
+      "appliedLimit",
+      "books",
+      "totalInCatalog",
+      "effectiveCriteria",
+      "truncated",
+      "shown",
+      "cap"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "additionalProperties": false,
+  "description": "Present only when more matching books exist.",
+  "properties": {
+    "arguments": {
+      "additionalProperties": false,
+      "description": "Executable search arguments preserving all filters. Page 1 may repeat already shown books when the browse cap cuts a page.",
+      "properties": {
+        "author_year_end": {
+          "description": "At least one author has a birth or death year on or before this year (CE positive, BCE negative).",
+          "maximum": 9007199254740991,
+          "minimum": -9007199254740991,
+          "type": "integer"
+        },
+        "author_year_start": {
+          "description": "At least one author has a birth or death year on or after this year (CE positive, BCE negative).",
+          "maximum": 9007199254740991,
+          "minimum": -9007199254740991,
+          "type": "integer"
+        },
+        "copyright": {
+          "description": "Any selected source copyright status: \"true\" copyrighted, \"false\" public domain in the USA, \"null\" unknown. Empty means all statuses; this is not worldwide legal clearance.",
+          "items": {
+            "enum": [
+              "true",
+              "false",
+              "null"
+            ],
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "ids": {
+          "description": "Restrict to these Gutenberg IDs, intersected with other filters. An empty list selects nothing; omit for unrestricted IDs.",
+          "items": {
+            "exclusiveMinimum": 0,
+            "maximum": 9007199254740991,
+            "type": "integer"
+          },
+          "type": "array"
+        },
+        "languages": {
+          "description": "Any listed two-character ISO 639-1 language code; empty means all languages.",
+          "items": {
+            "maxLength": 2,
+            "minLength": 2,
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "mime_type": {
+          "description": "Literal prefix of a format MIME key, such as \"text/plain\" or \"text/html\". Blank means unset.",
+          "type": "string"
+        },
+        "page": {
+          "default": 1,
+          "description": "One-indexed page of at most 32 matches. Pages beyond the result range are errors.",
+          "exclusiveMinimum": 0,
+          "maximum": 9007199254740991,
+          "type": "integer"
+        },
+        "query": {
+          "description": "Every nonblank word must occur in the title or an author name, case-insensitively, as a literal substring. More than four words require the local mirror; live fallback rejects longer queries. Whitespace separates words.",
+          "type": "string"
+        },
+        "sort": {
+          "default": "popular",
+          "description": "Popular orders by source-snapshot downloads in the last 30 days, with ID tie-breaks locally; ascending and descending order by Gutenberg ID.",
+          "enum": [
+            "popular",
+            "ascending",
+            "descending"
+          ],
+          "type": "string"
+        },
+        "topic": {
+          "description": "Case-insensitive phrase in a subject or bookshelf; blank means unset.",
+          "type": "string"
+        }
+      },
+      "required": [
+        "sort",
+        "page"
+      ],
+      "type": "object"
+    },
+    "tool": {
+      "const": "gutenberg_search_books",
+      "description": "Tool to call for the remaining matching books.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "tool",
+    "arguments"
+  ],
+  "type": "object"
+}

Added value: +{
+  "additionalProperties": false,
+  "description": "Normalized browse criteria, including popular sort and first page.",
+  "properties": {
+    "author_year_end": {
+      "description": "At least one author has a birth or death year on or before this year (CE positive, BCE negative).",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "author_year_start": {
+      "description": "At least one author has a birth or death year on or after this year (CE positive, BCE negative).",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "copyright": {
+      "description": "Any selected source copyright status: \"true\" copyrighted, \"false\" public domain in the USA, \"null\" unknown. Empty means all statuses; this is not worldwide legal clearance.",
+      "items": {
+        "enum": [
+          "true",
+          "false",
+          "null"
+        ],
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "ids": {
+      "description": "Restrict to these Gutenberg IDs, intersected with other filters. An empty list selects nothing; omit for unrestricted IDs.",
+      "items": {
+        "exclusiveMinimum": 0,
+        "maximum": 9007199254740991,
+        "type": "integer"
+      },
+      "type": "array"
+    },
+    "languages": {
+      "description": "Any listed two-character ISO 639-1 language code; empty means all languages.",
+      "items": {
+        "maxLength": 2,
+        "minLength": 2,
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "mime_type": {
+      "description": "Literal prefix of a format MIME key, such as \"text/plain\" or \"text/html\". Blank means unset.",
+      "type": "string"
+    },
+    "page": {
+      "default": 1,
+      "description": "One-indexed page of at most 32 matches. Pages beyond the result range are errors.",
+      "exclusiveMinimum": 0,
+      "maximum": 9007199254740991,
+      "type": "integer"
+    },
+    "query": {
+      "description": "Every nonblank word must occur in the title or an author name, case-insensitively, as a literal substring. More than four words require the local mirror; live fallback rejects longer queries. Whitespace separates words.",
+      "type": "string"
+    },
+    "sort": {
+      "default": "popular",
+      "description": "Popular orders by source-snapshot downloads in the last 30 days, with ID tie-breaks locally; ascending and descending order by Gutenberg ID.",
+      "enum": [
+        "popular",
+        "ascending",
+        "descending"
+      ],
+      "type": "string"
+    },
+    "topic": {
+      "description": "Case-insensitive phrase in a subject or bookshelf; blank means unset.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "sort",
+    "page"
+  ],
+  "type": "object"
+}

Previous value: -"Machine-readable failure mode. Declared by this tool: `no_results`: No books match the language/topic filter combination. `catalog_unavailable`: The Project Gutenberg catalog did not answer within the time this server allows for one browse. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `catalog_unavailable`: The Project Gutenberg catalog did not answer within the time this server allows for one browse. Other values are possible when a failure originates below the handler."

Previous value: -[
-  "no_results",
-  "catalog_unavailable"
-]New value: +[
+  "catalog_unavailable"
+]

Added value: +{
+  "description": "Guidance for empty or capped results.",
+  "type": "string"
+}

Added value: +{
+  "description": "Any selected source copyright status: \"true\" copyrighted, \"false\" public domain in the USA, \"null\" unknown. Empty means all statuses; this is not worldwide legal clearance.",
+  "items": {
+    "enum": [
+      "true",
+      "false",
+      "null"
+    ],
+    "type": "string"
+  },
+  "type": "array"
+}

Previous value: -"Narrow results to specific Gutenberg ID numbers. Other filters still apply. Useful for batch pre-fetching known IDs; use gutenberg_get_book for single-ID lookups."New value: +"Narrow results to these Gutenberg IDs, intersected with other filters. An empty list selects nothing; omit for unrestricted IDs. Use gutenberg_get_book for full single-ID metadata."

Added value: +{
+  "description": "Literal prefix of a format MIME key, such as \"text/plain\" or \"text/html\". Blank means unset.",
+  "type": "string"
+}

Previous value: -"Words to match against book titles and author names (case-insensitive, space-separated). Example: \"dickens expectations\" matches Great Expectations by Charles Dickens."New value: +"Every nonblank whitespace-separated word must match title or author name as a case-insensitive literal substring. More than four words require the local mirror; live fallback rejects longer queries. Example: \"dickens expectations\" matches Great Expectations."

Previous value: -[
-  {
-    "not": {
-      "required": [
-        "error"
-      ]
-    },
-    "required": [
-      "books",
-      "totalCount",
-      "page",
-      "hasMore"
-    ]
-  },
-  {
-    "required": [
-      "error"
-    ]
-  }
-]New value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "books",
+      "totalCount",
+      "page",
+      "hasMore",
+      "effectiveCriteria"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "additionalProperties": false,
+  "description": "Normalized search criteria, including sort and page defaults.",
+  "properties": {
+    "author_year_end": {
+      "description": "At least one author has a birth or death year on or before this year (CE positive, BCE negative).",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "author_year_start": {
+      "description": "At least one author has a birth or death year on or after this year (CE positive, BCE negative).",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "copyright": {
+      "description": "Any selected source copyright status: \"true\" copyrighted, \"false\" public domain in the USA, \"null\" unknown. Empty means all statuses; this is not worldwide legal clearance.",
+      "items": {
+        "enum": [
+          "true",
+          "false",
+          "null"
+        ],
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "ids": {
+      "description": "Restrict to these Gutenberg IDs, intersected with other filters. An empty list selects nothing; omit for unrestricted IDs.",
+      "items": {
+        "exclusiveMinimum": 0,
+        "maximum": 9007199254740991,
+        "type": "integer"
+      },
+      "type": "array"
+    },
+    "languages": {
+      "description": "Any listed two-character ISO 639-1 language code; empty means all languages.",
+      "items": {
+        "maxLength": 2,
+        "minLength": 2,
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "mime_type": {
+      "description": "Literal prefix of a format MIME key, such as \"text/plain\" or \"text/html\". Blank means unset.",
+      "type": "string"
+    },
+    "page": {
+      "default": 1,
+      "description": "One-indexed page of at most 32 matches. Pages beyond the result range are errors.",
+      "exclusiveMinimum": 0,
+      "maximum": 9007199254740991,
+      "type": "integer"
+    },
+    "query": {
+      "description": "Every nonblank word must occur in the title or an author name, case-insensitively, as a literal substring. More than four words require the local mirror; live fallback rejects longer queries. Whitespace separates words.",
+      "type": "string"
+    },
+    "sort": {
+      "default": "popular",
+      "description": "Popular orders by source-snapshot downloads in the last 30 days, with ID tie-breaks locally; ascending and descending order by Gutenberg ID.",
+      "enum": [
+        "popular",
+        "ascending",
+        "descending"
+      ],
+      "type": "string"
+    },
+    "topic": {
+      "description": "Case-insensitive phrase in a subject or bookshelf; blank means unset.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "sort",
+    "page"
+  ],
+  "type": "object"
+}

Previous value: -"Machine-readable failure mode. Declared by this tool: `no_results`: The query matched no books in the catalog. `page_out_of_range`: The requested page number is past the last page of results for this query. `catalog_unavailable`: The Project Gutenberg catalog did not answer within the time this server allows for one search. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `query_requires_mirror`: More than four query words were supplied while the local mirror could not answer. `page_out_of_range`: The requested page number is past the last page of results for this query. `catalog_unavailable`: The Project Gutenberg catalog did not answer within the time this server allows for one search. Other values are possible when a failure originates below the handler."

Previous value: -[
-  "no_results",
-  "page_out_of_range",
-  "catalog_unavailable"
-]New value: +[
+  "query_requires_mirror",
+  "page_out_of_range",
+  "catalog_unavailable"
+]

Added value: +{
+  "description": "Actionable guidance for an empty selection.",
+  "type": "string"
+}

Previous value: -"Number of books to return (1–32). Default 20 gives a useful overview without overwhelming context."New value: +"Requested number of books. Default 20; requests above 32 are capped locally at 32."

Previous value: -32New value: +9007199254740991

Previous value: -[
-  {
-    "not": {
-      "required": [
-        "error"
-      ]
-    },
-    "required": [
-      "books",
-      "totalInCatalog",
-      "truncated",
-      "shown",
-      "cap"
-    ]
-  },
-  {
-    "required": [
-      "error"
-    ]
-  }
-]New value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "requestedLimit",
+      "appliedLimit",
+      "books",
+      "totalInCatalog",
+      "truncated",
+      "shown",
+      "cap"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "description": "Book limit applied locally, at most 32.",
+  "type": "number"
+}

Previous value: -"Top books by download count, most popular first."New value: +"Top books by downloads in the last 30 days at the source snapshot, most popular first."

Previous value: -"Total downloads — the basis for the popularity ranking."New value: +"Downloads in the last 30 days at the source snapshot — the popularity ranking basis."

Previous value: -"True if media_type is \"Text\" AND a UTF-8 text/plain format is available via gutenberg_get_text."New value: +"True for Text records with UTF-8 plain text; HTML-only editions can still have is_readable=true."

Added value: +{
+  "description": "True for non-Sound records with UTF-8 plain text or HTML supported by gutenberg_get_text.",
+  "type": "boolean"
+}

Previous value: -[
-  "id",
-  "title",
-  "authors",
-  "languages",
-  "download_count",
-  "has_plain_text"
-]New value: +[
+  "id",
+  "title",
+  "authors",
+  "languages",
+  "download_count",
+  "has_plain_text",
+  "is_readable"
+]

Added value: +{
+  "description": "Positive integral book limit requested before capping.",
+  "type": "number"
+}

Previous value: -"Download count of the least-popular book shown — omitted books have at most this many downloads."New value: +"Downloads in the last 30 days at the source snapshot for the least-popular book shown; omitted books have at most this count."

Previous value: -[
-  {
-    "not": {
-      "required": [
-        "error"
-      ]
-    },
-    "required": [
-      "id",
-      "title",
-      "authors",
-      "translators",
-      "editors",
-      "subjects",
-      "bookshelves",
-      "languages",
-      "copyright",
-      "media_type",
-      "download_count",
-      "summary",
-      "summaries",
-      "formats",
-      "has_plain_text"
-    ]
-  },
-  {
-    "required": [
-      "error"
-    ]
-  }
-]New value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "id",
+      "title",
+      "authors",
+      "translators",
+      "editors",
+      "subjects",
+      "bookshelves",
+      "languages",
+      "copyright",
+      "media_type",
+      "download_count",
+      "source_notes",
+      "is_readable",
+      "summary",
+      "summaries",
+      "formats",
+      "has_plain_text"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Previous value: -"Total downloads — popularity signal."New value: +"Downloads in the last 30 days at the source snapshot, used for popularity ranking."

Previous value: -"True if media_type is \"Text\" AND a UTF-8 text/plain format (\"text/plain; charset=utf-8\") is present in formats — prerequisite for gutenberg_get_text."New value: +"True if media_type is \"Text\" and \"text/plain; charset=utf-8\" is present. HTML-only editions can still have is_readable=true."

Added value: +{
+  "description": "True for non-Sound records with a supported UTF-8 plain-text or HTML format for gutenberg_get_text.",
+  "type": "boolean"
+}

Previous value: -"\"Text\" for readable books, \"Sound\" for audio books. Only \"Text\" books have plain-text content available for gutenberg_get_text."New value: +"Source media type, such as \"Text\" or \"Sound\" (audio). Use is_readable to check reader support."

Added value: +{
+  "anyOf": [
+    {
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Source-provided RDF bibliographic notes in document order, including explicit edition references. [] means inspected with no notes; null means unavailable from this source."
+}

Previous value: -"Maximum number of characters to return in this chunk. Default 20,000 (~4–5 pages of prose). Increase toward 50,000 for large context windows. The actual returned length may be slightly less than limit when a natural paragraph boundary is found within 500 characters of the limit — check the length field in the response for the actual character count returned."New value: +"Requested maximum characters. Default 20,000 (~4–5 pages of prose); requests above 50,000 are capped locally at 50,000. Paragraph-boundary trimming may return less than the applied limit — use length for continuation."

Previous value: -50000New value: +9007199254740991

Previous value: -[
-  {
-    "not": {
-      "required": [
-        "error"
-      ]
-    },
-    "required": [
-      "id",
-      "title",
-      "text",
-      "offset",
-      "length",
-      "totalChars",
-      "remainingChars",
-      "hasMore",
-      "provenance",
-      "sourceFormat"
-    ]
-  },
-  {
-    "required": [
-      "error"
-    ]
-  }
-]New value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "id",
+      "title",
+      "text",
+      "offset",
+      "length",
+      "requestedLimit",
+      "appliedLimit",
+      "totalChars",
+      "remainingChars",
+      "hasMore",
+      "provenance",
+      "sourceFormat"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "description": "Character limit applied to this chunk, at most 50,000.",
+  "type": "number"
+}

Previous value: -"Machine-readable failure mode. Declared by this tool: `not_found`: No book exists with the given ID. `audio_book`: The book is an audio recording (media_type \"Sound\"), not a text book — no literary plain text is available. `no_text_format`: The book has no UTF-8 plain-text or HTML edition available to read (for example an older ASCII-only entry). `offset_out_of_range`: The offset is greater than or equal to totalChars (past the end of the book). `text_fetch_failed`: The Gutenberg file server returned an error or did not respond within the timeout. `catalog_unavailable`: The catalog lookup that precedes reading a book did not answer within the time this server allows. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `text_file_not_found`: The catalog entry exists but its mirror text file returned HTTP 404. `text_fetch_rejected`: The mirror permanently rejected this text request. `invalid_text_response`: The mirror returned an empty document, HTML on a plain-text path, or recognizable server failure document. `not_found`: No book exists with the given ID. `audio_book`: The book is an audio recording (media_type \"Sound\"), not a text book — no literary plain text is available. `no_text_format`: The book has no UTF-8 plain-text or HTML edition available to read (for example an older ASCII-only entry). `offset_out_of_range`: The offset is greater than or equal to totalChars (past the end of the book). `text_fetch_failed`: The Gutenberg mirror had a transient failure or did not respond within the request budget. `catalog_unavailable`: The catalog lookup that precedes reading a book did not answer within the time this server allows. Other values are possible when a failure originates below the handler."

Previous value: -[
-  "not_found",
-  "audio_book",
-  "no_text_format",
-  "offset_out_of_range",
-  "text_fetch_failed",
-  "catalog_unavailable"
-]New value: +[
+  "text_file_not_found",
+  "text_fetch_rejected",
+  "invalid_text_response",
+  "not_found",
+  "audio_book",
+  "no_text_format",
+  "offset_out_of_range",
+  "text_fetch_failed",
+  "catalog_unavailable"
+]

Added value: +{
+  "description": "Positive integral character limit requested by the caller, before capping.",
+  "type": "number"
+}

Previous value: -"Result ordering. \"popular\" (default) sorts by download count descending. \"ascending\" and \"descending\" sort by Gutenberg ID number."New value: +"Result ordering. \"popular\" (default) sorts by downloads in the last 30 days at the source snapshot, descending. \"ascending\" and \"descending\" sort by Gutenberg ID number."

Previous value: -"Total downloads from Project Gutenberg — a real popularity signal reflecting actual reader interest."New value: +"Downloads in the last 30 days at the source snapshot."

Previous value: -"True if the book has media_type \"Text\" AND a UTF-8 text/plain format available — prerequisite for gutenberg_get_text."New value: +"True for Text records with UTF-8 plain text; HTML-only editions can still have is_readable=true."

Added value: +{
+  "description": "True for non-Sound records with UTF-8 plain text or HTML supported by gutenberg_get_text.",
+  "type": "boolean"
+}

Previous value: -[
-  "id",
-  "title",
-  "authors",
-  "languages",
-  "subjects",
-  "download_count",
-  "has_plain_text"
-]New value: +[
+  "id",
+  "title",
+  "authors",
+  "languages",
+  "subjects",
+  "download_count",
+  "has_plain_text",
+  "is_readable"
+]

Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "number",
+  "null"
+]

Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "number",
+  "null"
+]

Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "number",
+  "null"
+]

Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "number",
+  "null"
+]

Removed value: -[
-  {
-    "type": "boolean"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "boolean",
+  "null"
+]

Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "number",
+  "null"
+]

Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "number",
+  "null"
+]

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "number",
+  "null"
+]

Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "number",
+  "null"
+]

Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "number",
+  "null"
+]

Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "number",
+  "null"
+]

Previous value: -"Machine-readable failure mode. Declared by this tool: `no_results`: No books match the language/topic filter combination. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `no_results`: No books match the language/topic filter combination. `catalog_unavailable`: The Project Gutenberg catalog did not answer within the time this server allows for one browse. Other values are possible when a failure originates below the handler."

Previous value: -[
-  "no_results"
-]New value: +[
+  "no_results",
+  "catalog_unavailable"
+]

Previous value: -[
-  {
-    "not": {
-      "required": [
-        "error"
-      ]
-    },
-    "required": [
-      "id",
-      "title",
-      "authors",
-      "translators",
-      "editors",
-      "subjects",
-      "bookshelves",
-      "languages",
-      "copyright",
-      "media_type",
-      "download_count",
-      "summary",
-      "formats",
-      "has_plain_text"
-    ]
-  },
-  {
-    "required": [
-      "error"
-    ]
-  }
-]New value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "id",
+      "title",
+      "authors",
+      "translators",
+      "editors",
+      "subjects",
+      "bookshelves",
+      "languages",
+      "copyright",
+      "media_type",
+      "download_count",
+      "summary",
+      "summaries",
+      "formats",
+      "has_plain_text"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Previous value: -"Machine-readable failure mode. Declared by this tool: `not_found`: No book exists with the given ID. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `not_found`: No book exists with the given ID. `catalog_unavailable`: The Project Gutenberg catalog did not answer within the time this server allows for one lookup. Other values are possible when a failure originates below the handler."

Previous value: -[
-  "not_found"
-]New value: +[
+  "not_found",
+  "catalog_unavailable"
+]

Added value: +{
+  "description": "Every summary Gutendex holds for this work, in upstream order. Usually one; some records carry a long and a short variant. Empty when there are none.",
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

Previous value: -"Auto-generated summary of the work, when available. Absent on many older records."New value: +"First entry of summaries — the primary auto-generated summary of the work, or null when Gutendex has none."

Previous value: -"Machine-readable failure mode. Declared by this tool: `not_found`: No book exists with the given ID. `audio_book`: The book is an audio recording (media_type \"Sound\"), not a text book — no literary plain text is available. `no_text_format`: The book has no UTF-8 plain-text or HTML edition available to read (for example an older ASCII-only entry). `offset_out_of_range`: The offset is greater than or equal to totalChars (past the end of the book). `text_fetch_failed`: The Gutenberg file server returned an error or did not respond within the timeout. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `not_found`: No book exists with the given ID. `audio_book`: The book is an audio recording (media_type \"Sound\"), not a text book — no literary plain text is available. `no_text_format`: The book has no UTF-8 plain-text or HTML edition available to read (for example an older ASCII-only entry). `offset_out_of_range`: The offset is greater than or equal to totalChars (past the end of the book). `text_fetch_failed`: The Gutenberg file server returned an error or did not respond within the timeout. `catalog_unavailable`: The catalog lookup that precedes reading a book did not answer within the time this server allows. Other values are possible when a failure originates below the handler."

Previous value: -[
-  "not_found",
-  "audio_book",
-  "no_text_format",
-  "offset_out_of_range",
-  "text_fetch_failed"
-]New value: +[
+  "not_found",
+  "audio_book",
+  "no_text_format",
+  "offset_out_of_range",
+  "text_fetch_failed",
+  "catalog_unavailable"
+]

Previous value: -"Machine-readable failure mode. Declared by this tool: `no_results`: The query matched no books in the catalog. `page_out_of_range`: The requested page number is past the last page of results for this query. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `no_results`: The query matched no books in the catalog. `page_out_of_range`: The requested page number is past the last page of results for this query. `catalog_unavailable`: The Project Gutenberg catalog did not answer within the time this server allows for one search. Other values are possible when a failure originates below the handler."

Previous value: -[
-  "no_results",
-  "page_out_of_range"
-]New value: +[
+  "no_results",
+  "page_out_of_range",
+  "catalog_unavailable"
+]

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": [
+      "books",
+      "totalInCatalog",
+      "truncated",
+      "shown",
+      "cap"
+    ]
+  },
+  {
+    "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: `no_results`: No books match the language/topic filter combination. Other values are possible when a failure originates below the handler.",
+          "examples": [
+            "no_results"
+          ],
+          "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: -[
-  "books",
-  "totalInCatalog",
-  "truncated",
-  "shown",
-  "cap"
-]

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": [
+      "id",
+      "title",
+      "authors",
+      "translators",
+      "editors",
+      "subjects",
+      "bookshelves",
+      "languages",
+      "copyright",
+      "media_type",
+      "download_count",
+      "summary",
+      "formats",
+      "has_plain_text"
+    ]
+  },
+  {
+    "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: `not_found`: No book exists with the given ID. Other values are possible when a failure originates below the handler.",
+          "examples": [
+            "not_found"
+          ],
+          "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: -[
-  "id",
-  "title",
-  "authors",
-  "translators",
-  "editors",
-  "subjects",
-  "bookshelves",
-  "languages",
-  "copyright",
-  "media_type",
-  "download_count",
-  "summary",
-  "formats",
-  "has_plain_text"
-]

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": [
+      "id",
+      "title",
+      "text",
+      "offset",
+      "length",
+      "totalChars",
+      "remainingChars",
+      "hasMore",
+      "provenance",
+      "sourceFormat"
+    ]
+  },
+  {
+    "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: `not_found`: No book exists with the given ID. `audio_book`: The book is an audio recording (media_type \"Sound\"), not a text book — no literary plain text is available. `no_text_format`: The book has no UTF-8 plain-text or HTML edition available to read (for example an older ASCII-only entry). `offset_out_of_range`: The offset is greater than or equal to totalChars (past the end of the book). `text_fetch_failed`: The Gutenberg file server returned an error or did not respond within the timeout. Other values are possible when a failure originates below the handler.",
+          "examples": [
+            "not_found",
+            "audio_book",
+            "no_text_format",
+            "offset_out_of_range",
+            "text_fetch_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: -[
-  "id",
-  "title",
-  "text",
-  "offset",
-  "length",
-  "totalChars",
-  "remainingChars",
-  "hasMore",
-  "provenance",
-  "sourceFormat"
-]

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": [
+      "books",
+      "totalCount",
+      "page",
+      "hasMore"
+    ]
+  },
+  {
+    "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: `no_results`: The query matched no books in the catalog. `page_out_of_range`: The requested page number is past the last page of results for this query. Other values are possible when a failure originates below the handler.",
+          "examples": [
+            "no_results",
+            "page_out_of_range"
+          ],
+          "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: -[
-  "books",
-  "totalCount",
-  "page",
-  "hasMore"
-]

Previous value: -"True if media_type is \"Text\" AND a text/plain format is available via gutenberg_get_text."New value: +"True if media_type is \"Text\" AND a UTF-8 text/plain format is available via gutenberg_get_text."

Previous value: -"True if media_type is \"Text\" AND a text/plain format (UTF-8 or ASCII) is present in formats — prerequisite for gutenberg_get_text."New value: +"True if media_type is \"Text\" AND a UTF-8 text/plain format (\"text/plain; charset=utf-8\") is present in formats — prerequisite for gutenberg_get_text."

Previous value: -"True if the book has media_type \"Text\" AND a text/plain format available — prerequisite for gutenberg_get_text."New value: +"True if the book has media_type \"Text\" AND a UTF-8 text/plain format available — prerequisite for gutenberg_get_text."