feat(mcp): paginate record lists and describe document inputs

backend/src/mcp/tools/wiki.ts

@@ -1,3 +1,4 @@
+import { limitFromArgs, offsetFromArgs, paginatedResult, paginationProperties } from "../pagination"
 import { and, asc, eq, ilike, isNull } from "drizzle-orm"
 import { wikiPages } from "../../../db/schema"
 import { McpContext, McpTool } from "../types"
@@ -27,17 +28,7 @@ const pageIdArg = (args: Record<string, unknown>, key = "id") => {
     return value
 }
 
-const limitFromArgs = (args: Record<string, unknown>) => {
-    const value = Number(args.limit ?? 50)
-    if (!Number.isFinite(value)) return 50
-    return Math.min(Math.max(Math.trunc(value), 1), 100)
-}
 
-const offsetFromArgs = (args: Record<string, unknown>) => {
-    const value = Number(args.offset ?? 0)
-    if (!Number.isFinite(value)) return 0
-    return Math.max(Math.trunc(value), 0)
-}
 
 export function prepareWikiScope(args: Record<string, unknown>): WikiScope {
     const entityType = stringArg(args, "entityType")
@@ -144,8 +135,8 @@ export const wikiTools: McpTool[] = [
                 ...entityScopeProperties,
                 query: { type: "string", description: "Optionaler Suchtext im Titel." },
                 parentId: { type: ["string", "null"], format: "uuid", description: "Optional auf direkte Kinder dieses Ordners einschränken; null steht für die oberste Ebene." },
-                limit: { type: "integer", minimum: 1, maximum: 100, default: 50 },
-                offset: { type: "integer", minimum: 0, default: 0 },
+                ...paginationProperties,
+                limit: { ...paginationProperties.limit, default: 50 },
             },
         },
         async handler(context, args) {
@@ -173,11 +164,11 @@ export const wikiTools: McpTool[] = [
                 })
                 .from(wikiPages)
                 .where(and(...conditions))
-                .orderBy(asc(wikiPages.sortOrder), asc(wikiPages.title))
-                .limit(limitFromArgs(args))
+                .orderBy(asc(wikiPages.sortOrder), asc(wikiPages.title), wikiPages.id)
+                .limit(limitFromArgs(args, 50) + 1)
                 .offset(offsetFromArgs(args))
 
-            return { rows }
+            return paginatedResult(rows, args, 50)
         },
     },
     {