diff --git a/extensions/memory-wiki/src/gateway.test.ts b/extensions/memory-wiki/src/gateway.test.ts
index b3eb61e7bb9..332d8211fd3 100644
--- a/extensions/memory-wiki/src/gateway.test.ts
+++ b/extensions/memory-wiki/src/gateway.test.ts
@@ -468,6 +468,37 @@ describe("memory-wiki gateway methods", () => {
     });
   });
 
+  it.each([
+    ["wiki.importRuns", { limit: 0 }, "limit must be a positive integer"],
+    [
+      "wiki.search",
+      { query: "Teams Azure", maxResults: 1.5 },
+      "maxResults must be a positive integer",
+    ],
+    ["wiki.get", { lookup: "Teams Azure", fromLine: 1.5 }, "fromLine must be a positive integer"],
+    ["wiki.get", { lookup: "Teams Azure", lineCount: 0 }, "lineCount must be a positive integer"],
+  ])("rejects invalid positive integer gateway param for %s", async (method, params, message) => {
+    const { config } = await createVault({ prefix: "memory-wiki-gateway-" });
+    const { api, registerGatewayMethod } = createPluginApi();
+
+    registerMemoryWikiGatewayMethods({ api, config });
+    const handler = findGatewayHandler(registerGatewayMethod, method);
+    if (!handler) {
+      throw new Error(`${method} handler missing`);
+    }
+    const respond = vi.fn();
+
+    await handler({
+      params,
+      respond,
+    });
+
+    expect(readRespondError(respond)).toEqual({
+      code: "internal_error",
+      message,
+    });
+  });
+
   it("forwards wiki.search mode and corpus options over the gateway", async () => {
     const { config } = await createVault({ prefix: "memory-wiki-gateway-" });
     const { api, registerGatewayMethod } = createPluginApi();
diff --git a/extensions/memory-wiki/src/gateway.ts b/extensions/memory-wiki/src/gateway.ts
index 6f7a026fb95..1f28877c873 100644
--- a/extensions/memory-wiki/src/gateway.ts
+++ b/extensions/memory-wiki/src/gateway.ts
@@ -1,5 +1,6 @@
 import { formatErrorMessage } from "openclaw/plugin-sdk/error-runtime";
 import { resolveDefaultAgentId } from "openclaw/plugin-sdk/memory-host-core";
+import { readPositiveIntegerParam } from "openclaw/plugin-sdk/param-readers";
 import type { OpenClawConfig, OpenClawPluginApi } from "../api.js";
 import { applyMemoryWikiMutation, normalizeMemoryWikiMutationInput } from "./apply.js";
 import { compileMemoryWikiVault } from "./compile.js";
@@ -55,20 +56,6 @@ function readStringParam(
   return undefined;
 }
 
-function readNumberParam(params: Record<string, unknown>, key: string): number | undefined {
-  const value = params[key];
-  if (typeof value === "number" && Number.isFinite(value)) {
-    return value;
-  }
-  if (typeof value === "string" && value.trim()) {
-    const parsed = Number(value);
-    if (Number.isFinite(parsed)) {
-      return parsed;
-    }
-  }
-  return undefined;
-}
-
 function readEnumParam<T extends string>(
   params: Record<string, unknown>,
   key: string,
@@ -135,7 +122,7 @@ export function registerMemoryWikiGatewayMethods(params: {
     "wiki.importRuns",
     async ({ params: requestParams, respond }) => {
       try {
-        const limit = readNumberParam(requestParams, "limit");
+        const limit = readPositiveIntegerParam(requestParams, "limit");
         respond(true, await listMemoryWikiImportRuns(config, limit !== undefined ? { limit } : {}));
       } catch (error) {
         respondError(respond, error);
@@ -287,7 +274,7 @@ export function registerMemoryWikiGatewayMethods(params: {
       try {
         await syncImportedSourcesIfNeeded(config, appConfig);
         const query = readStringParam(requestParams, "query", { required: true });
-        const maxResults = readNumberParam(requestParams, "maxResults");
+        const maxResults = readPositiveIntegerParam(requestParams, "maxResults");
         const searchBackend = readEnumParam(requestParams, "backend", WIKI_SEARCH_BACKENDS);
         const searchCorpus = readEnumParam(requestParams, "corpus", WIKI_SEARCH_CORPORA);
         const mode = readEnumParam(requestParams, "mode", WIKI_SEARCH_MODES);
@@ -337,8 +324,8 @@ export function registerMemoryWikiGatewayMethods(params: {
       try {
         await syncImportedSourcesIfNeeded(config, appConfig);
         const lookup = readStringParam(requestParams, "lookup", { required: true });
-        const fromLine = readNumberParam(requestParams, "fromLine");
-        const lineCount = readNumberParam(requestParams, "lineCount");
+        const fromLine = readPositiveIntegerParam(requestParams, "fromLine");
+        const lineCount = readPositiveIntegerParam(requestParams, "lineCount");
         const searchBackend = readEnumParam(requestParams, "backend", WIKI_SEARCH_BACKENDS);
         const searchCorpus = readEnumParam(requestParams, "corpus", WIKI_SEARCH_CORPORA);
         const agentId = resolveGatewayAgentId(requestParams, appConfig);
diff --git a/extensions/memory-wiki/src/tool.ts b/extensions/memory-wiki/src/tool.ts
index dd7c071ccc6..41cc71c0810 100644
--- a/extensions/memory-wiki/src/tool.ts
+++ b/extensions/memory-wiki/src/tool.ts
@@ -36,7 +36,7 @@ const WikiSearchModeSchema = Type.Union(WIKI_SEARCH_MODES.map((value) => Type.Li
 const WikiSearchSchema = Type.Object(
   {
     query: Type.String({ minLength: 1 }),
-    maxResults: Type.Optional(Type.Number({ minimum: 1 })),
+    maxResults: Type.Optional(Type.Integer({ minimum: 1 })),
     backend: Type.Optional(WikiSearchBackendSchema),
     corpus: Type.Optional(WikiSearchCorpusSchema),
     mode: Type.Optional(WikiSearchModeSchema),
@@ -46,8 +46,8 @@ const WikiSearchSchema = Type.Object(
 const WikiGetSchema = Type.Object(
   {
     lookup: Type.String({ minLength: 1 }),
-    fromLine: Type.Optional(Type.Number({ minimum: 1 })),
-    lineCount: Type.Optional(Type.Number({ minimum: 1 })),
+    fromLine: Type.Optional(Type.Integer({ minimum: 1 })),
+    lineCount: Type.Optional(Type.Integer({ minimum: 1 })),
     backend: Type.Optional(WikiSearchBackendSchema),
     corpus: Type.Optional(WikiSearchCorpusSchema),
   },