feat: 优化 MCP 工具响应与描述

- 改写 5 个工具的描述，明确调用顺序、何时使用、返回结构
- list_endpoints 与 search_endpoints 支持 cursor/limit 分页
- get_endpoint_detail 将 OpenAPI schema 扁平化为字段列表（2 层展开）
- 抽取 jsonOk/textOk/textError 响应辅助函数
- 错误响应附带样例 ID 与可用模块提示，方便 LLM 自我纠正

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/mcp/src/lib/responses.ts

@@ -0,0 +1,14 @@
+type ToolContent = { type: 'text'; text: string };
+type ToolResult = { content: ToolContent[]; isError?: true };
+
+export function jsonOk(value: unknown): ToolResult {
+  return { content: [{ type: 'text', text: JSON.stringify(value) }] };
+}
+
+export function textOk(text: string): ToolResult {
+  return { content: [{ type: 'text', text }] };
+}
+
+export function textError(text: string): ToolResult {
+  return { content: [{ type: 'text', text }], isError: true };
+}

packages/mcp/src/lib/schema-flatten.ts

@@ -0,0 +1,221 @@
+type AnySchema = Record<string, any> | null | undefined;
+
+export type FlatField = {
+  name: string;
+  type: string;
+  required: boolean;
+  description?: string;
+  example?: unknown;
+  enum?: unknown[];
+  format?: string;
+  /** Object-typed field — child fields expanded one more level. */
+  fields?: FlatField[];
+  /** Array-typed field whose items are objects — element fields expanded one level. */
+  items?: FlatField[];
+  /** True when the field has nested structure that was NOT expanded (depth limit reached). */
+  nested?: true;
+};
+
+export type FlatSchema =
+  | { kind: 'object'; fields: FlatField[]; additionalProperties?: true }
+  | { kind: 'array'; items: FlatSchema }
+  | { kind: 'primitive'; type: string; format?: string; enum?: unknown[]; example?: unknown }
+  | { kind: 'variants'; variants: FlatSchema[] }
+  | { kind: 'unknown' };
+
+export type FlatParameter = {
+  name: string;
+  in: string;
+  required: boolean;
+  type: string;
+  description?: string;
+  example?: unknown;
+  enum?: unknown[];
+  format?: string;
+};
+
+export type FlatRequestBody = {
+  contentType: string;
+  required: boolean;
+  schema: FlatSchema;
+} | null;
+
+export type FlatResponse = {
+  status: string;
+  description?: string;
+  contentType?: string;
+  schema?: FlatSchema;
+};
+
+const MAX_DEPTH = 1;
+
+function describeType(s: AnySchema): string {
+  if (!s) return 'unknown';
+  if (Array.isArray(s.type)) return s.type.join('|');
+  if (typeof s.type === 'string') {
+    if (s.type === 'array' && s.items?.type) return `array<${describeType(s.items)}>`;
+    return s.type;
+  }
+  if (s.properties || s.additionalProperties) return 'object';
+  if (s.oneOf || s.anyOf) return 'variants';
+  if (s.allOf) return 'object';
+  return 'unknown';
+}
+
+function mergeAllOf(schemas: AnySchema[]): Record<string, any> {
+  const merged: Record<string, any> = { type: 'object', properties: {}, required: [] };
+  for (const s of schemas) {
+    if (!s) continue;
+    if (s.properties) Object.assign(merged.properties, s.properties);
+    if (Array.isArray(s.required)) merged.required.push(...s.required);
+    if (s.description && !merged.description) merged.description = s.description;
+  }
+  merged.required = Array.from(new Set(merged.required));
+  return merged;
+}
+
+function resolveSchema(s: AnySchema): AnySchema {
+  if (!s || typeof s !== 'object') return s;
+  if (Array.isArray(s.allOf) && s.allOf.length > 0) return resolveSchema(mergeAllOf(s.allOf));
+  return s;
+}
+
+function buildFields(schema: AnySchema, depth: number): FlatField[] {
+  const resolved = resolveSchema(schema);
+  if (!resolved || typeof resolved !== 'object') return [];
+  const required = new Set<string>(Array.isArray(resolved.required) ? resolved.required : []);
+  const canExpand = depth < MAX_DEPTH;
+
+  return Object.entries(resolved.properties || {}).map(([name, propRaw]) => {
+    const prop = resolveSchema(propRaw as AnySchema);
+    const field: FlatField = {
+      name,
+      type: describeType(prop),
+      required: required.has(name),
+    };
+    if (prop?.description) field.description = String(prop.description);
+    if (prop?.example !== undefined) field.example = prop.example;
+    if (Array.isArray(prop?.enum)) field.enum = prop.enum;
+    if (prop?.format) field.format = String(prop.format);
+
+    const itemsSchema = prop?.items ? resolveSchema(prop.items) : null;
+    const isObj = !!(prop && (prop.properties || prop.type === 'object'));
+    const isArrayOfObjects = !!(itemsSchema && (itemsSchema.properties || itemsSchema.type === 'object'));
+
+    if (isObj) {
+      if (canExpand) field.fields = buildFields(prop, depth + 1);
+      else field.nested = true;
+    } else if (isArrayOfObjects) {
+      if (canExpand) field.items = buildFields(itemsSchema, depth + 1);
+      else field.nested = true;
+    }
+    return field;
+  });
+}
+
+export function flattenSchema(schema: AnySchema, depth = 0): FlatSchema {
+  if (!schema || typeof schema !== 'object') return { kind: 'unknown' };
+
+  if (Array.isArray(schema.allOf) && schema.allOf.length > 0) {
+    return flattenSchema(mergeAllOf(schema.allOf), depth);
+  }
+
+  if (Array.isArray(schema.oneOf) || Array.isArray(schema.anyOf)) {
+    const list = (schema.oneOf || schema.anyOf) as AnySchema[];
+    return { kind: 'variants', variants: list.map((s) => flattenSchema(s, depth)) };
+  }
+
+  if (schema.type === 'array' || schema.items) {
+    const items = depth >= MAX_DEPTH
+      ? ({ kind: 'primitive', type: describeType(schema.items) } as FlatSchema)
+      : flattenSchema(schema.items, depth + 1);
+    return { kind: 'array', items };
+  }
+
+  const isObjectLike = schema.type === 'object' || schema.properties || schema.additionalProperties;
+  if (isObjectLike) {
+    const fields = buildFields(schema, depth);
+    const out: Extract<FlatSchema, { kind: 'object' }> = { kind: 'object', fields };
+    if (schema.additionalProperties && Object.keys(schema.properties || {}).length === 0) {
+      out.additionalProperties = true;
+    }
+    return out;
+  }
+
+  const primitive: Extract<FlatSchema, { kind: 'primitive' }> = {
+    kind: 'primitive',
+    type: describeType(schema),
+  };
+  if (schema.format) primitive.format = String(schema.format);
+  if (Array.isArray(schema.enum)) primitive.enum = schema.enum;
+  if (schema.example !== undefined) primitive.example = schema.example;
+  return primitive;
+}
+
+export function flattenParameters(params: unknown): FlatParameter[] {
+  if (!Array.isArray(params)) return [];
+  return params.map((pRaw) => {
+    const p = pRaw as Record<string, any>;
+    const inlineSchema: AnySchema = p.schema ?? p;
+    const param: FlatParameter = {
+      name: String(p.name ?? ''),
+      in: String(p.in ?? 'query'),
+      required: !!p.required,
+      type: describeType(inlineSchema),
+    };
+    if (p.description) param.description = String(p.description);
+    const example = p.example ?? inlineSchema?.example;
+    if (example !== undefined) param.example = example;
+    const enumVals = inlineSchema?.enum ?? p.enum;
+    if (Array.isArray(enumVals)) param.enum = enumVals;
+    const format = inlineSchema?.format ?? p.format;
+    if (format) param.format = String(format);
+    return param;
+  });
+}
+
+export function flattenRequestBody(body: unknown): FlatRequestBody {
+  if (!body || typeof body !== 'object') return null;
+  const b = body as Record<string, any>;
+  // OpenAPI 3 style
+  if (b.content && typeof b.content === 'object') {
+    const contentType = Object.keys(b.content)[0];
+    if (!contentType) return null;
+    return {
+      contentType,
+      required: !!b.required,
+      schema: flattenSchema(b.content[contentType]?.schema),
+    };
+  }
+  // Swagger 2 converted style: { schema }
+  if (b.schema) {
+    return {
+      contentType: 'application/json',
+      required: !!b.required,
+      schema: flattenSchema(b.schema),
+    };
+  }
+  return null;
+}
+
+export function flattenResponses(responses: unknown): FlatResponse[] {
+  if (!responses || typeof responses !== 'object') return [];
+  return Object.entries(responses as Record<string, any>).map(([status, raw]) => {
+    const r = raw as Record<string, any>;
+    const out: FlatResponse = { status };
+    if (r?.description) out.description = String(r.description);
+    // OpenAPI 3
+    if (r?.content && typeof r.content === 'object') {
+      const contentType = Object.keys(r.content)[0];
+      if (contentType) {
+        out.contentType = contentType;
+        out.schema = flattenSchema(r.content[contentType]?.schema);
+      }
+    } else if (r?.schema) {
+      // Swagger 2
+      out.contentType = 'application/json';
+      out.schema = flattenSchema(r.schema);
+    }
+    return out;
+  });
+}

packages/mcp/src/server.ts

@@ -18,40 +18,83 @@ export function createMcpServer(projectId: string, clientIp: string = ''): McpSe
 
   server.tool(
     'get_project_overview',
-    'Get an overview of this API project including its name, version, base URL, and a summary of available modules with endpoint counts. Call this first to understand what the API offers.',
+    [
+      'Returns a high-level snapshot of this API project: name, version, baseUrl, totalEndpoints, totalModules, and a compact module list (id + name + endpointCount, no descriptions).',
+      'Call this FIRST when you have no prior context about the API. Cheap (~500B).',
+      'Use list_modules instead if you need module descriptions to choose between modules.',
+      'Next steps: pick a moduleId and call list_endpoints, or jump straight to search_endpoints with a keyword.',
+    ].join(' '),
     {},
     async () => logMcpCall(ctx('get_project_overview'), () => getProjectOverview(projectId)),
   );
 
   server.tool(
     'list_modules',
-    'List all API modules/groups with their descriptions. Each module contains related endpoints. Use this when you need module descriptions to decide which module to explore.',
+    [
+      'Returns ALL modules with their descriptions and endpoint counts. Use this when get_project_overview did not give you enough information to choose a module (i.e., you need the description text to disambiguate).',
+      'Returns { total, modules: [{ id, name, description, endpointCount }] }.',
+      'Do not call this if you already know which module to drill into — go straight to list_endpoints.',
+    ].join(' '),
     {},
     async () => logMcpCall(ctx('list_modules'), () => listModules(projectId)),
   );
 
   server.tool(
     'list_endpoints',
-    'List all endpoints in a specific module. Returns method, path, and summary for each endpoint. Use get_endpoint_detail to get full information about a specific endpoint.',
+    [
-    { moduleId: z.string().describe('The module ID to list endpoints for. Get module IDs from get_project_overview or list_modules.') },
+      'Returns endpoint summaries inside a single module: { moduleId, moduleName, total, nextCursor, endpoints: [{ id, method, path, summary, deprecated }] }.',
-    async ({ moduleId }) => logMcpCall(ctx('list_endpoints', { moduleId }), () => listEndpoints(projectId, moduleId)),
+      'Paginated: pass `cursor` (the previous response\'s `nextCursor`) to fetch the next page; pass `limit` (default 50, max 200) to control page size. `nextCursor` is null when there are no more results.',
+      'Use search_endpoints instead if you have a keyword and don\'t want to paginate through everything.',
+      'Then call get_endpoint_detail with an endpoint id to see parameters/request/response shapes.',
+    ].join(' '),
+    {
+      moduleId: z.string().describe('The module id from get_project_overview or list_modules. Example: "clx9k2abc0001..."'),
+      cursor: z.string().optional().describe('Pagination cursor: pass the `nextCursor` from a previous response to fetch the next page. Omit for the first page.'),
+      limit: z.number().int().min(1).max(200).optional().describe('Page size, default 50, max 200. Increase only if you actually need more endpoints in one call.'),
+    },
+    async ({ moduleId, cursor, limit }) =>
+      logMcpCall(
+        ctx('list_endpoints', { moduleId, cursor, limit }),
+        () => listEndpoints(projectId, moduleId, { cursor, limit }),
+      ),
   );
 
   server.tool(
     'get_endpoint_detail',
-    'Get complete details for a specific endpoint including parameters, request body schema, response schemas. Use this when you need to understand exactly how to call an endpoint.',
+    [
-    { endpointId: z.string().describe('The endpoint ID. Get endpoint IDs from list_endpoints or search_endpoints.') },
+      'Returns the full callable contract of one endpoint, with OpenAPI schemas already FLATTENED into field lists you can read without parsing JSON Schema.',
-    async ({ endpointId }) => logMcpCall(ctx('get_endpoint_detail', { endpointId }), () => getEndpointDetail(projectId, endpointId)),
+      'Returns: { id, method, path, summary, description, operationId, moduleId, moduleName, deprecated, parameters: [{ name, in, required, type, description?, example?, enum?, format? }], requestBody: { contentType, required, schema } | null, responses: [{ status, description?, contentType?, schema? }] }.',
+      'A `schema` is one of: { kind: "object", fields: [<field>] } | { kind: "array", items: <schema> } | { kind: "primitive", type, ... } | { kind: "variants", variants: [<schema>] }. Each field is { name, type, required, description?, example?, enum?, format?, fields? (nested object expanded one more level), items? (array element fields expanded one level), nested? (true if structure goes deeper than expanded) }. The expansion goes 2 levels deep total — that is enough to construct a request body in 99% of cases without further calls.',
+      'Call this when you are about to actually use an endpoint and need its parameters/body/response shape.',
+    ].join(' '),
+    {
+      endpointId: z.string().describe('The endpoint id from list_endpoints or search_endpoints. Example: "clx9k2def0042..."'),
+    },
+    async ({ endpointId }) =>
+      logMcpCall(
+        ctx('get_endpoint_detail', { endpointId }),
+        () => getEndpointDetail(projectId, endpointId),
+      ),
   );
 
   server.tool(
     'search_endpoints',
-    'Search for endpoints by keyword. Searches across path, summary, description, and operationId. Optionally filter by module. Returns matching endpoint summaries.',
+    [
+      'Case-insensitive substring search across endpoint path, summary, description, and operationId.',
+      'Returns: { total, hasMore, results: [{ id, method, path, summary, deprecated, moduleId, moduleName }], hint? }.',
+      'Prefer this over list_endpoints when you have any keyword from the user request (a noun, a path segment, an action verb). Default page size is 20 (max 100). When `hasMore: true`, narrow the keyword or scope to a moduleId rather than just raising the limit.',
+      'Then call get_endpoint_detail with one of the returned ids.',
+    ].join(' '),
     {
-      keyword: z.string().describe('Search keyword to match against endpoint path, summary, description, and operationId.'),
+      keyword: z.string().min(1).describe('Substring to match. Examples: "user", "/orders", "createPet", "checkout". Single word works best; multi-word phrases match literally.'),
-      moduleId: z.string().optional().describe('Optional module ID to limit search scope. Omit to search all modules.'),
+      moduleId: z.string().optional().describe('Optional: limit search to one module id. Omit to search across the whole project.'),
+      limit: z.number().int().min(1).max(100).optional().describe('Max results to return, default 20, max 100.'),
     },
-    async ({ keyword, moduleId }) => logMcpCall(ctx('search_endpoints', { keyword, moduleId }), () => searchEndpoints(projectId, keyword, moduleId)),
+    async ({ keyword, moduleId, limit }) =>
+      logMcpCall(
+        ctx('search_endpoints', { keyword, moduleId, limit }),
+        () => searchEndpoints(projectId, keyword, { moduleId, limit }),
+      ),
   );
 
   return server;

packages/mcp/src/tools/get-endpoint-detail.ts

@@ -1,22 +1,38 @@
 import { prisma } from '@agent-fox/shared';
+import { flattenParameters, flattenRequestBody, flattenResponses } from '../lib/schema-flatten.js';
+import { jsonOk, textError } from '../lib/responses.js';
 
 export async function getEndpointDetail(projectId: string, endpointId: string) {
   const endpoint = await prisma.endpoint.findFirst({
     where: { id: endpointId, projectId },
-    include: { module: { select: { name: true } } },
+    include: { module: { select: { id: true, name: true } } },
   });
 
   if (!endpoint) {
-    return { content: [{ type: 'text' as const, text: `Endpoint "${endpointId}" not found. Use list_endpoints to see available endpoints.` }], isError: true };
+    const sample = await prisma.endpoint.findMany({
+      where: { projectId },
+      select: { id: true, method: true, path: true },
+      orderBy: { id: 'asc' },
+      take: 5,
+    });
+    const hint = sample.length > 0
+      ? ` Example endpoint IDs in this project: ${sample.map((e) => `${e.id} (${e.method} ${e.path})`).join(', ')}.`
+      : ' This project has no endpoints yet — verify the OpenAPI import succeeded.';
+    return textError(`Endpoint id "${endpointId}" not found in this project. Use search_endpoints with a keyword from the URL or summary, or list_endpoints to browse a module.${hint}`);
   }
 
-  const detail = {
+  return jsonOk({
-    id: endpoint.id, method: endpoint.method, path: endpoint.path,
+    id: endpoint.id,
-    summary: endpoint.summary, description: endpoint.description,
+    method: endpoint.method,
-    operationId: endpoint.operationId, moduleName: endpoint.module.name,
+    path: endpoint.path,
-    parameters: endpoint.parameters, requestBody: endpoint.requestBody,
+    summary: endpoint.summary,
-    responses: endpoint.responses, deprecated: endpoint.deprecated,
+    description: endpoint.description,
-  };
+    operationId: endpoint.operationId,
-
+    moduleId: endpoint.module.id,
-  return { content: [{ type: 'text' as const, text: JSON.stringify(detail, null, 2) }] };
+    moduleName: endpoint.module.name,
+    deprecated: endpoint.deprecated,
+    parameters: flattenParameters(endpoint.parameters),
+    requestBody: flattenRequestBody(endpoint.requestBody),
+    responses: flattenResponses(endpoint.responses),
+  });
 }

packages/mcp/src/tools/get-project-overview.ts

@@ -1,4 +1,5 @@
 import { prisma } from '@agent-fox/shared';
+import { jsonOk, textError } from '../lib/responses.js';
 
 export async function getProjectOverview(projectId: string) {
   const project = await prisma.project.findUnique({
@@ -14,19 +15,18 @@ export async function getProjectOverview(projectId: string) {
   });
 
   if (!project) {
-    return { content: [{ type: 'text' as const, text: 'Project not found' }], isError: true };
+    return textError('Project not found. The project may have been deleted; ask the user to verify the MCP URL points to an existing project.');
   }
 
-  const overview = {
+  return jsonOk({
     name: project.name,
     description: project.description,
     version: project.openApiVersion,
     baseUrl: project.baseUrl,
     totalEndpoints: project._count.endpoints,
+    totalModules: project.modules.length,
     modules: project.modules.map((m) => ({
       id: m.id, name: m.name, endpointCount: m._count.endpoints,
     })),
-  };
+  });
-
-  return { content: [{ type: 'text' as const, text: JSON.stringify(overview, null, 2) }] };
 }

packages/mcp/src/tools/list-endpoints.ts

@@ -1,16 +1,60 @@
 import { prisma } from '@agent-fox/shared';
+import { jsonOk, textError, textOk } from '../lib/responses.js';
 
-export async function listEndpoints(projectId: string, moduleId: string) {
+const DEFAULT_LIMIT = 50;
-  const mod = await prisma.module.findFirst({ where: { id: moduleId, projectId } });
+const MAX_LIMIT = 200;
+
+export type ListEndpointsOptions = { cursor?: string; limit?: number };
+
+export async function listEndpoints(
+  projectId: string,
+  moduleId: string,
+  opts: ListEndpointsOptions = {},
+) {
+  const mod = await prisma.module.findFirst({
+    where: { id: moduleId, projectId },
+    select: { id: true, name: true },
+  });
   if (!mod) {
-    return { content: [{ type: 'text' as const, text: `Module "${moduleId}" not found. Use get_project_overview or list_modules to see available modules.` }], isError: true };
+    const sample = await prisma.module.findMany({
+      where: { projectId },
+      select: { id: true, name: true },
+      orderBy: { sortOrder: 'asc' },
+      take: 5,
+    });
+    const hint = sample.length > 0
+      ? ` Available modules: ${sample.map((m) => `${m.name} (${m.id})`).join(', ')}.`
+      : ' This project has no modules — verify the OpenAPI import succeeded.';
+    return textError(`Module id "${moduleId}" not found in this project. Use list_modules for the full list.${hint}`);
   }
 
-  const endpoints = await prisma.endpoint.findMany({
+  const take = Math.min(Math.max(1, opts.limit ?? DEFAULT_LIMIT), MAX_LIMIT);
+
+  // Pagination orders by id (cuid, monotonic enough for stable cursors); LLM
+  // gets the path/method on every row, so display order doesn't really matter.
+  const [total, rows] = await Promise.all([
+    prisma.endpoint.count({ where: { projectId, moduleId } }),
+    prisma.endpoint.findMany({
       where: { projectId, moduleId },
       select: { id: true, method: true, path: true, summary: true, deprecated: true },
-    orderBy: [{ path: 'asc' }, { method: 'asc' }],
+      orderBy: { id: 'asc' },
-  });
+      take: take + 1,
+      ...(opts.cursor ? { cursor: { id: opts.cursor }, skip: 1 } : {}),
+    }),
+  ]);
 
-  return { content: [{ type: 'text' as const, text: JSON.stringify(endpoints, null, 2) }] };
+  if (total === 0) {
+    return textOk(`Module "${mod.name}" exists but contains 0 endpoints. This usually means the OpenAPI import did not group any endpoints into this module — check the source spec's tags or path prefixes.`);
+  }
+
+  const hasMore = rows.length > take;
+  const endpoints = hasMore ? rows.slice(0, take) : rows;
+
+  return jsonOk({
+    moduleId: mod.id,
+    moduleName: mod.name,
+    total,
+    nextCursor: hasMore ? endpoints[endpoints.length - 1].id : null,
+    endpoints,
+  });
 }

packages/mcp/src/tools/list-modules.ts

@@ -1,4 +1,5 @@
 import { prisma } from '@agent-fox/shared';
+import { jsonOk, textOk } from '../lib/responses.js';
 
 export async function listModules(projectId: string) {
   const modules = await prisma.module.findMany({
@@ -7,9 +8,17 @@ export async function listModules(projectId: string) {
     orderBy: { sortOrder: 'asc' },
   });
 
-  const result = modules.map((m) => ({
+  if (modules.length === 0) {
-    id: m.id, name: m.name, description: m.description, endpointCount: m._count.endpoints,
+    return textOk('This project has 0 modules. The OpenAPI import may have failed or the spec contains no operations. Ask the project owner to re-import a valid OpenAPI document.');
-  }));
+  }
-
+
-  return { content: [{ type: 'text' as const, text: JSON.stringify(result, null, 2) }] };
+  return jsonOk({
+    total: modules.length,
+    modules: modules.map((m) => ({
+      id: m.id,
+      name: m.name,
+      description: m.description,
+      endpointCount: m._count.endpoints,
+    })),
+  });
 }

packages/mcp/src/tools/search-endpoints.ts

@@ -1,8 +1,18 @@
 import { prisma } from '@agent-fox/shared';
+import { jsonOk, textOk } from '../lib/responses.js';
 
-export async function searchEndpoints(projectId: string, keyword: string, moduleId?: string) {
+const DEFAULT_LIMIT = 20;
+const MAX_LIMIT = 100;
+
+export type SearchEndpointsOptions = { moduleId?: string; limit?: number };
+
+export async function searchEndpoints(
+  projectId: string,
+  keyword: string,
+  opts: SearchEndpointsOptions = {},
+) {
   const where: any = { projectId };
-  if (moduleId) where.moduleId = moduleId;
+  if (opts.moduleId) where.moduleId = opts.moduleId;
 
   where.OR = [
     { path: { contains: keyword, mode: 'insensitive' } },
@@ -11,24 +21,41 @@ export async function searchEndpoints(projectId: string, keyword: string, module
     { operationId: { contains: keyword, mode: 'insensitive' } },
   ];
 
-  const endpoints = await prisma.endpoint.findMany({
+  const take = Math.min(Math.max(1, opts.limit ?? DEFAULT_LIMIT), MAX_LIMIT);
+
+  const [total, rows] = await Promise.all([
+    prisma.endpoint.count({ where }),
+    prisma.endpoint.findMany({
       where,
       select: {
         id: true, method: true, path: true, summary: true, deprecated: true,
-      module: { select: { name: true } },
+        module: { select: { id: true, name: true } },
       },
-    orderBy: [{ path: 'asc' }, { method: 'asc' }],
+      orderBy: [{ path: 'asc' }, { method: 'asc' }, { id: 'asc' }],
-    take: 20,
+      take,
-  });
+    }),
+  ]);
 
-  if (endpoints.length === 0) {
+  if (total === 0) {
-    return { content: [{ type: 'text' as const, text: `No endpoints found matching "${keyword}". Try a different keyword or use list_modules to browse.` }] };
+    const moduleHint = opts.moduleId ? ' (within the specified module)' : '';
+    return textOk(`No endpoints match "${keyword}"${moduleHint}. Try a shorter or different keyword (search covers path, summary, description, operationId), or omit moduleId to search across all modules. Use list_modules to browse available modules.`);
   }
 
-  const result = endpoints.map((e) => ({
+  const results = rows.map((e) => ({
-    id: e.id, method: e.method, path: e.path, summary: e.summary,
+    id: e.id,
-    moduleName: e.module.name, deprecated: e.deprecated,
+    method: e.method,
+    path: e.path,
+    summary: e.summary,
+    deprecated: e.deprecated,
+    moduleId: e.module.id,
+    moduleName: e.module.name,
   }));
 
-  return { content: [{ type: 'text' as const, text: JSON.stringify(result, null, 2) }] };
+  const hasMore = total > results.length;
+  return jsonOk({
+    total,
+    hasMore,
+    results,
+    ...(hasMore && { hint: `Showing first ${results.length} of ${total}. Narrow with a more specific keyword, scope to a moduleId, or raise limit (max ${MAX_LIMIT}).` }),
+  });
 }