diff --git a/src/infra/outbound/message-action-param-keys.ts b/src/infra/outbound/message-action-param-keys.ts
new file mode 100644
index 00000000000..e6eda89e585
--- /dev/null
+++ b/src/infra/outbound/message-action-param-keys.ts
@@ -0,0 +1,57 @@
+import { normalizeOptionalString } from "../../shared/string-coerce.js";
+
+const STANDARD_MESSAGE_ACTION_PARAM_KEYS = new Set([
+  "accountId",
+  "asDocument",
+  "base64",
+  "bestEffort",
+  "blocks",
+  "buttons",
+  "caption",
+  "card",
+  "channel",
+  "channelId",
+  "components",
+  "contentType",
+  "dryRun",
+  "filePath",
+  "fileUrl",
+  "filename",
+  "forceDocument",
+  "gifPlayback",
+  "image",
+  "interactive",
+  "media",
+  "mediaUrl",
+  "message",
+  "mimeType",
+  "path",
+  "pollAnonymous",
+  "pollDurationHours",
+  "pollMulti",
+  "pollOption",
+  "pollPublic",
+  "pollQuestion",
+  "replyTo",
+  "silent",
+  "target",
+  "targets",
+  "text",
+  "threadId",
+  "to",
+]);
+
+export function hasPotentialPluginActionParam(params: Record<string, unknown>): boolean {
+  return Object.entries(params).some(([key, value]) => {
+    if (STANDARD_MESSAGE_ACTION_PARAM_KEYS.has(key)) {
+      return false;
+    }
+    if (typeof value === "string") {
+      return Boolean(normalizeOptionalString(value));
+    }
+    if (typeof value === "number") {
+      return Number.isFinite(value);
+    }
+    return value !== undefined;
+  });
+}
diff --git a/src/infra/outbound/message-action-params.test.ts b/src/infra/outbound/message-action-params.test.ts
index ad418b5aa69..9bda17441dd 100644
--- a/src/infra/outbound/message-action-params.test.ts
+++ b/src/infra/outbound/message-action-params.test.ts
@@ -1,13 +1,23 @@
 import fs from "node:fs/promises";
 import os from "node:os";
 import path from "node:path";
-import { describe, expect, it } from "vitest";
+import { beforeEach, describe, expect, it, vi } from "vitest";
 import type { OpenClawConfig } from "../../config/config.js";
+
+const { resolveChannelMessageToolMediaSourceParamKeysMock } = vi.hoisted(() => ({
+  resolveChannelMessageToolMediaSourceParamKeysMock: vi.fn(() => ["avatarPath", "avatarUrl"]),
+}));
+
+vi.mock("../../channels/plugins/message-action-discovery.js", () => ({
+  resolveChannelMessageToolMediaSourceParamKeys: resolveChannelMessageToolMediaSourceParamKeysMock,
+}));
+
 import {
   collectActionMediaSourceHints,
   hydrateAttachmentParamsForAction,
   normalizeSandboxMediaList,
   normalizeSandboxMediaParams,
+  resolveExtraActionMediaSourceParamKeys,
   resolveAttachmentMediaPolicy,
 } from "./message-action-params.js";
 
@@ -16,6 +26,52 @@ const maybeIt = process.platform === "win32" ? it.skip : it;
 const matrixMediaSourceParamKeys = ["avatarPath", "avatarUrl"] as const;
 
 describe("message action media helpers", () => {
+  beforeEach(() => {
+    resolveChannelMessageToolMediaSourceParamKeysMock.mockClear();
+  });
+
+  it("skips plugin media discovery when args only use standard action params", () => {
+    expect(
+      resolveExtraActionMediaSourceParamKeys({
+        cfg,
+        action: "send",
+        channel: "slack",
+        args: {
+          channel: "slack",
+          target: "#C12345678",
+          message: "hi",
+          media: "https://example.com/photo.png",
+        },
+      }),
+    ).toEqual([]);
+    expect(resolveChannelMessageToolMediaSourceParamKeysMock).not.toHaveBeenCalled();
+  });
+
+  it("discovers plugin media params when args include an extension-owned field", () => {
+    expect(
+      resolveExtraActionMediaSourceParamKeys({
+        cfg,
+        action: "set-profile",
+        channel: "matrix",
+        args: {
+          channel: "matrix",
+          avatarPath: "/workspace/avatars/profile.png",
+        },
+      }),
+    ).toEqual(["avatarPath", "avatarUrl"]);
+    expect(resolveChannelMessageToolMediaSourceParamKeysMock).toHaveBeenCalledWith({
+      cfg,
+      action: "set-profile",
+      channel: "matrix",
+      accountId: undefined,
+      sessionKey: undefined,
+      sessionId: undefined,
+      agentId: undefined,
+      requesterSenderId: undefined,
+      senderIsOwner: undefined,
+    });
+  });
+
   it("prefers sandbox media policy when sandbox roots are non-blank", () => {
     expect(
       resolveAttachmentMediaPolicy({
diff --git a/src/infra/outbound/message-action-params.ts b/src/infra/outbound/message-action-params.ts
index a81ba45d99a..83027ccccdb 100644
--- a/src/infra/outbound/message-action-params.ts
+++ b/src/infra/outbound/message-action-params.ts
@@ -17,6 +17,7 @@ import { loadWebMedia } from "../../media/web-media.js";
 import { resolveSnakeCaseParamKey } from "../../param-key.js";
 import { readBooleanParam as readBooleanParamShared } from "../../plugin-sdk/boolean-param.js";
 import { normalizeOptionalString } from "../../shared/string-coerce.js";
+import { hasPotentialPluginActionParam } from "./message-action-param-keys.js";
 
 export const readBooleanParam = readBooleanParamShared;
 
@@ -60,6 +61,7 @@ function buildActionMediaSourceParamKeys(extraParamKeys?: readonly string[]): st
 export function resolveExtraActionMediaSourceParamKeys(params: {
   cfg: OpenClawConfig;
   action?: ChannelMessageActionName;
+  args: Record<string, unknown>;
   channel?: string;
   accountId?: string | null;
   sessionKey?: string | null;
@@ -68,6 +70,9 @@ export function resolveExtraActionMediaSourceParamKeys(params: {
   requesterSenderId?: string | null;
   senderIsOwner?: boolean;
 }): string[] {
+  if (!hasPotentialPluginActionParam(params.args)) {
+    return [];
+  }
   return resolveChannelMessageToolMediaSourceParamKeys({
     cfg: params.cfg,
     action: params.action,
diff --git a/src/infra/outbound/message-action-runner.ts b/src/infra/outbound/message-action-runner.ts
index 0e613bed9dc..31d2c9acdd6 100644
--- a/src/infra/outbound/message-action-runner.ts
+++ b/src/infra/outbound/message-action-runner.ts
@@ -860,6 +860,7 @@ export async function runMessageAction(
   const extraActionMediaSourceParamKeys = resolveExtraActionMediaSourceParamKeys({
     cfg,
     action,
+    args: params,
     channel,
     accountId,
     sessionKey: input.sessionKey,
diff --git a/src/infra/outbound/message-action-spec.ts b/src/infra/outbound/message-action-spec.ts
index dba62f954af..fef1bd9254f 100644
--- a/src/infra/outbound/message-action-spec.ts
+++ b/src/infra/outbound/message-action-spec.ts
@@ -4,6 +4,7 @@ import {
   normalizeOptionalLowercaseString,
   normalizeOptionalString,
 } from "../../shared/string-coerce.js";
+import { hasPotentialPluginActionParam } from "./message-action-param-keys.js";
 
 export type MessageActionTargetMode = "to" | "channelId" | "none";
 
@@ -84,6 +85,7 @@ const ACTION_TARGET_ALIASES: Partial<Record<ChannelMessageActionName, ActionTarg
 
 function listActionTargetAliasSpecs(
   action: ChannelMessageActionName,
+  params: Record<string, unknown>,
   channel?: string,
 ): ActionTargetAliasSpec[] {
   const specs: ActionTargetAliasSpec[] = [];
@@ -92,7 +94,7 @@ function listActionTargetAliasSpecs(
     specs.push(coreSpec);
   }
   const normalizedChannel = normalizeOptionalLowercaseString(channel);
-  if (!normalizedChannel) {
+  if (!normalizedChannel || !hasPotentialPluginActionParam(params)) {
     return specs;
   }
   const plugin = getBootstrapChannelPlugin(normalizedChannel);
@@ -120,7 +122,7 @@ export function actionHasTarget(
   if (channelId) {
     return true;
   }
-  const specs = listActionTargetAliasSpecs(action, options?.channel);
+  const specs = listActionTargetAliasSpecs(action, params, options?.channel);
   if (specs.length === 0) {
     return false;
   }