diff --git a/CHANGELOG.md b/CHANGELOG.md
index f29e19d75..cf18d3020 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@ Docs: https://docs.openclaw.ai
 - Discord/Streaming: add stream preview mode for live draft replies with partial/block options and configurable chunking. Thanks @thewilloftheshadow. Inspiration @neoagentic-ship-it.
 - Discord/Telegram: add configurable lifecycle status reactions for queued/thinking/tool/done/error phases with a shared controller and emoji/timing overrides. Thanks @wolly-tundracube and @thewilloftheshadow.
 - Discord/Voice: add voice channel join/leave/status via `/vc`, plus auto-join configuration for realtime voice conversations. Thanks @thewilloftheshadow.
+- Discord: support updating forum `available_tags` via channel edit actions for forum tag management. (#12070) Thanks @xiaoyaner0201.
 - Channels: allow per-channel model overrides via `channels.modelByChannel` and note them in /status. Thanks @thewilloftheshadow.
 - Discord: include channel topics in trusted inbound metadata on new sessions. Thanks @thewilloftheshadow.
 - Docs/Discord: document forum channel thread creation flows and component limits. Thanks @thewilloftheshadow.
diff --git a/src/agents/tools/common.test.ts b/src/agents/tools/common.test.ts
new file mode 100644
index 000000000..c99c62f5a
--- /dev/null
+++ b/src/agents/tools/common.test.ts
@@ -0,0 +1,28 @@
+import { describe, expect, test } from "vitest";
+import { parseAvailableTags } from "./common.js";
+
+describe("parseAvailableTags", () => {
+  test("returns undefined for non-array inputs", () => {
+    expect(parseAvailableTags(undefined)).toBeUndefined();
+    expect(parseAvailableTags(null)).toBeUndefined();
+    expect(parseAvailableTags("oops")).toBeUndefined();
+  });
+
+  test("drops entries without a string name and returns undefined when empty", () => {
+    expect(parseAvailableTags([{ id: "1" }])).toBeUndefined();
+    expect(parseAvailableTags([{ name: 123 }])).toBeUndefined();
+  });
+
+  test("keeps falsy ids and sanitizes emoji fields", () => {
+    const result = parseAvailableTags([
+      { id: "0", name: "General", emoji_id: null },
+      { id: "1", name: "Docs", emoji_name: "📚" },
+      { name: "Bad", emoji_id: 123 },
+    ]);
+    expect(result).toEqual([
+      { id: "0", name: "General", emoji_id: null },
+      { id: "1", name: "Docs", emoji_name: "📚" },
+      { name: "Bad" },
+    ]);
+  });
+});
diff --git a/src/agents/tools/common.ts b/src/agents/tools/common.ts
index 93f1db42e..74865abf2 100644
--- a/src/agents/tools/common.ts
+++ b/src/agents/tools/common.ts
@@ -1,7 +1,7 @@
-import fs from "node:fs/promises";
 import type { AgentTool, AgentToolResult } from "@mariozechner/pi-agent-core";
-import { detectMime } from "../../media/mime.js";
+import fs from "node:fs/promises";
 import type { ImageSanitizationLimits } from "../image-sanitization.js";
+import { detectMime } from "../../media/mime.js";
 import { sanitizeToolResultImages } from "../tool-images.js";
 
 // oxlint-disable-next-line typescript/no-explicit-any
@@ -273,3 +273,41 @@ export async function imageResultFromFile(params: {
     imageSanitization: params.imageSanitization,
   });
 }
+
+export type AvailableTag = {
+  id?: string;
+  name: string;
+  moderated?: boolean;
+  emoji_id?: string | null;
+  emoji_name?: string | null;
+};
+
+/**
+ * Validate and parse an `availableTags` parameter from untrusted input.
+ * Returns `undefined` when the value is missing or not an array.
+ * Entries that lack a string `name` are silently dropped.
+ */
+export function parseAvailableTags(raw: unknown): AvailableTag[] | undefined {
+  if (raw === undefined || raw === null) {
+    return undefined;
+  }
+  if (!Array.isArray(raw)) {
+    return undefined;
+  }
+  const result = raw
+    .filter(
+      (t): t is Record<string, unknown> =>
+        typeof t === "object" && t !== null && typeof t.name === "string",
+    )
+    .map((t) => ({
+      ...(t.id !== undefined && typeof t.id === "string" ? { id: t.id } : {}),
+      name: t.name as string,
+      ...(typeof t.moderated === "boolean" ? { moderated: t.moderated } : {}),
+      ...(t.emoji_id === null || typeof t.emoji_id === "string" ? { emoji_id: t.emoji_id } : {}),
+      ...(t.emoji_name === null || typeof t.emoji_name === "string"
+        ? { emoji_name: t.emoji_name }
+        : {}),
+    }));
+  // Return undefined instead of empty array to avoid accidentally clearing all tags
+  return result.length ? result : undefined;
+}
diff --git a/src/agents/tools/discord-actions-guild.ts b/src/agents/tools/discord-actions-guild.ts
index 85fbdc572..630c6e9ac 100644
--- a/src/agents/tools/discord-actions-guild.ts
+++ b/src/agents/tools/discord-actions-guild.ts
@@ -24,6 +24,7 @@ import {
 import {
   type ActionGate,
   jsonResult,
+  parseAvailableTags,
   readNumberParam,
   readStringArrayParam,
   readStringParam,
@@ -334,6 +335,7 @@ export async function handleDiscordGuildAction(
       const autoArchiveDuration = readNumberParam(params, "autoArchiveDuration", {
         integer: true,
       });
+      const availableTags = parseAvailableTags(params.availableTags);
       const channel = accountId
         ? await editChannelDiscord(
             {
@@ -347,6 +349,7 @@ export async function handleDiscordGuildAction(
               archived,
               locked,
               autoArchiveDuration: autoArchiveDuration ?? undefined,
+              availableTags,
             },
             { accountId },
           )
@@ -361,6 +364,7 @@ export async function handleDiscordGuildAction(
             archived,
             locked,
             autoArchiveDuration: autoArchiveDuration ?? undefined,
+            availableTags,
           });
       return jsonResult({ ok: true, channel });
     }
diff --git a/src/channels/plugins/actions/discord/handle-action.guild-admin.ts b/src/channels/plugins/actions/discord/handle-action.guild-admin.ts
index 688698dd6..9e957bce4 100644
--- a/src/channels/plugins/actions/discord/handle-action.guild-admin.ts
+++ b/src/channels/plugins/actions/discord/handle-action.guild-admin.ts
@@ -1,5 +1,7 @@
 import type { AgentToolResult } from "@mariozechner/pi-agent-core";
+import type { ChannelMessageActionContext } from "../../types.js";
 import {
+  parseAvailableTags,
   readNumberParam,
   readStringArrayParam,
   readStringParam,
@@ -9,7 +11,6 @@ import {
   readDiscordModerationCommand,
 } from "../../../../agents/tools/discord-actions-moderation-shared.js";
 import { handleDiscordAction } from "../../../../agents/tools/discord-actions.js";
-import type { ChannelMessageActionContext } from "../../types.js";
 
 type Ctx = Pick<
   ChannelMessageActionContext,
@@ -195,6 +196,7 @@ export async function tryHandleDiscordMessageActionGuildAdmin(params: {
     const autoArchiveDuration = readNumberParam(actionParams, "autoArchiveDuration", {
       integer: true,
     });
+    const availableTags = parseAvailableTags(actionParams.availableTags);
     return await handleDiscordAction(
       {
         action: "channelEdit",
@@ -209,6 +211,7 @@ export async function tryHandleDiscordMessageActionGuildAdmin(params: {
         archived,
         locked,
         autoArchiveDuration: autoArchiveDuration ?? undefined,
+        availableTags,
       },
       cfg,
     );
diff --git a/src/discord/send.channels.ts b/src/discord/send.channels.ts
index 829afeb1f..9a4097c25 100644
--- a/src/discord/send.channels.ts
+++ b/src/discord/send.channels.ts
@@ -1,6 +1,5 @@
 import type { APIChannel } from "discord-api-types/v10";
 import { Routes } from "discord-api-types/v10";
-import { resolveDiscordRest } from "./send.shared.js";
 import type {
   DiscordChannelCreate,
   DiscordChannelEdit,
@@ -8,6 +7,7 @@ import type {
   DiscordChannelPermissionSet,
   DiscordReactOpts,
 } from "./send.types.js";
+import { resolveDiscordRest } from "./send.shared.js";
 
 export async function createChannelDiscord(
   payload: DiscordChannelCreate,
@@ -70,6 +70,15 @@ export async function editChannelDiscord(
   if (payload.autoArchiveDuration !== undefined) {
     body.auto_archive_duration = payload.autoArchiveDuration;
   }
+  if (payload.availableTags !== undefined) {
+    body.available_tags = payload.availableTags.map((t) => ({
+      ...(t.id !== undefined && { id: t.id }),
+      name: t.name,
+      ...(t.moderated !== undefined && { moderated: t.moderated }),
+      ...(t.emoji_id !== undefined && { emoji_id: t.emoji_id }),
+      ...(t.emoji_name !== undefined && { emoji_name: t.emoji_name }),
+    }));
+  }
   return (await rest.patch(Routes.channel(payload.channelId), {
     body,
   })) as APIChannel;
diff --git a/src/discord/send.types.ts b/src/discord/send.types.ts
index fa8b3b831..a13f90b1e 100644
--- a/src/discord/send.types.ts
+++ b/src/discord/send.types.ts
@@ -134,6 +134,14 @@ export type DiscordChannelCreate = {
   nsfw?: boolean;
 };
 
+export type DiscordForumTag = {
+  id?: string;
+  name: string;
+  moderated?: boolean;
+  emoji_id?: string | null;
+  emoji_name?: string | null;
+};
+
 export type DiscordChannelEdit = {
   channelId: string;
   name?: string;
@@ -145,6 +153,7 @@ export type DiscordChannelEdit = {
   archived?: boolean;
   locked?: boolean;
   autoArchiveDuration?: number;
+  availableTags?: DiscordForumTag[];
 };
 
 export type DiscordChannelMove = {