docs(mcp): sync write-tool specs with #502 literal-markdown behavior (#502 review)

The four MCP markdown-write tools (updatePageMarkdown/createPage/patchNode/
insertNode) still described the old parse-everything behavior after #502 turned
TeX math and fuzzy autolink OFF on the write paths. Add a concise contract hint
to each: $...$ / $$...$$ stay literal (not a math formula) and schemeless
www.host / bare emails are not auto-linked (explicit https:// still links); for
a real formula use updatePageJson (or a mathInline/mathBlock node via `node` on
patch/insert). Also note getPage format:"text" in README.md/README.ru.md.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/mcp/README.md

@@ -118,7 +118,10 @@ All 41 tools, grouped by what you'd reach for them.
 - **`getPage`** — A page's content as clean **Markdown** (canonical for text; drops only
   block ids, resolved-comment anchors, and a fixed no-Markdown-representation attr set —
   table spans/colwidth/background, indent, `callout.icon`, `orderedList.type`, and link
-  `internal`/`target`/`rel`/`class`; use `getPageJson` when you need those).
+  `internal`/`target`/`rel`/`class`; use `getPageJson` when you need those). Pass
+  `format:"text"` for a flat, deterministic plain-text rendering (one line per block,
+  marks dropped, stable `[image]`/`[table RxC]` placeholders) to machine-diff what you
+  wrote against what was stored.
 - **`getPageJson`** — A page's **lossless ProseMirror/TipTap JSON**, including every
   block's `attrs.id` and the `slugId` used in URLs. This is what the per-block editing
   tools consume.

packages/mcp/README.ru.md

@@ -123,7 +123,10 @@ Docmost-MCP не сочетают:
   лишь id блоков, якоря разрешённых комментариев и фиксированный набор атрибутов без
   markdown-представления — спаны/colwidth/фон ячеек таблиц, отступы (indent),
   `callout.icon`, `orderedList.type` и `internal`/`target`/`rel`/`class` у ссылок;
-  используйте `getPageJson`, когда они нужны).
+  используйте `getPageJson`, когда они нужны). Передайте `format:"text"` для плоского
+  детерминированного plain-text рендера (одна строка на блок, маркировка убрана,
+  стабильные плейсхолдеры `[image]`/`[table RxC]`) — чтобы machine-diff'ом сверить то,
+  что вы записали, с тем, что сохранилось.
 - **`getPageJson`** — **Lossless ProseMirror/TipTap JSON** страницы, включая `attrs.id`
   каждого блока и `slugId`, используемый в URL. Именно его потребляют инструменты
   поблочного редактирования.

packages/mcp/src/tool-specs.ts

@@ -469,7 +469,11 @@ export const SHARED_TOOL_SPECS = {
       '(markdown). The fragment may be SEVERAL blocks (a "1 → N" splice: rewrite a ' +
       'whole section in one call) — the first block inherits this block id, the ' +
       'rest get fresh ids. `^[...]` footnotes are supported (their definitions ' +
-      "merge into the page's footnote list). REJECTED when the target is a table " +
+      "merge into the page's footnote list). Markdown is taken LITERALLY — " +
+      '`$...$`/`$$...$$` are NOT parsed as math and schemeless `www.host` / bare ' +
+      'emails are NOT auto-linked (an explicit `https://` URL still links); for a ' +
+      'real formula pass a `mathInline`/`mathBlock` ProseMirror node via `node` ' +
+      '(or updatePageJson). REJECTED when the target is a table ' +
       'cell with attributes markdown cannot represent (merged/colored/fixed-width) ' +
       '— use the table tools or `node`. ' +
       '`node` (for precise attr/mark work): a raw ProseMirror node, e.g. a ' +
@@ -535,6 +539,10 @@ export const SHARED_TOOL_SPECS = {
       'Provide EXACTLY ONE of `markdown` or `node`. ' +
       '`markdown` (RECOMMENDED): a canonical markdown fragment — may be SEVERAL ' +
       'blocks, inserted in order at the anchor; `^[...]` footnotes supported. ' +
+      'Markdown is taken LITERALLY — `$...$`/`$$...$$` are NOT parsed as math and ' +
+      'schemeless `www.host` / bare emails are NOT auto-linked (an explicit ' +
+      '`https://` URL still links); for a real formula pass a ' +
+      '`mathInline`/`mathBlock` ProseMirror node via `node` (or updatePageJson). ' +
       '`node` (for precise attr/mark work OR table structure): a raw ProseMirror ' +
       'node. Table structure is JSON-only (not expressible in markdown): to add a ' +
       'tableRow, pass a tableRow node with position before/after and anchor INSIDE ' +
@@ -1095,8 +1103,12 @@ export const SHARED_TOOL_SPECS = {
     description:
       'Create a new page with a Markdown body in a space, optionally under a ' +
       'parent page (omit parentPageId to create at the space root). Returns ' +
-      'the new page id and title. Reversible: a page can be moved to trash ' +
-      'later.',
+      'the new page id and title. Body text is taken LITERALLY — ' +
+      '`$...$`/`$$...$$` are NOT parsed into a math formula and schemeless ' +
+      '`www.host` / bare emails are NOT auto-linked (an explicit `https://` URL ' +
+      'still links); for a real formula use updatePageJson with ' +
+      '`mathInline`/`mathBlock` nodes instead. Reversible: a page can be moved ' +
+      'to trash later.',
     tier: 'deferred',
     catalogLine: 'createPage — create a new page with a Markdown body in a space.',
     // Reconciled schema DRIFT: the MCP copy pinned `content` to .min(1) while
@@ -1355,7 +1367,11 @@ export const SHARED_TOOL_SPECS = {
       'title). The whole body is re-imported from the markdown (block ids ' +
       'regenerate — for surgical or id-preserving edits use the find/replace, ' +
       'node-patch or page-JSON tools instead). Docmost-flavoured markdown is ' +
-      'parsed, including `^[...]` inline footnotes. Reversible: the previous ' +
+      'parsed, including `^[...]` inline footnotes. Text is taken LITERALLY — ' +
+      '`$...$`/`$$...$$` are NOT parsed into a math formula and schemeless ' +
+      '`www.host` / bare emails are NOT auto-linked (an explicit `https://` URL ' +
+      'still links); for a real formula use updatePageJson with ' +
+      '`mathInline`/`mathBlock` nodes instead. Reversible: the previous ' +
       'version is kept in page history.',
     tier: 'deferred',
     catalogLine: