diff --git a/internal/util/proxy.go b/internal/util/proxy.go
index d9e251859..eeba34db2 100644
--- a/internal/util/proxy.go
+++ b/internal/util/proxy.go
@@ -16,6 +16,9 @@ import (
 const (
 	// EnvNoProxy disables automatic proxy support when set to any non-empty value.
 	EnvNoProxy = "LARK_CLI_NO_PROXY"
+	// EnvNoProxyWarning suppresses the one-time proxy warning when set to any non-empty value.
+	// The proxy itself is still used; only the stderr warning is silenced.
+	EnvNoProxyWarning = "LARK_CLI_NO_PROXY_WARNING"
 )
 
 // proxyEnvKeys lists environment variables that Go's ProxyFromEnvironment reads.
@@ -60,7 +63,7 @@ func redactProxyURL(raw string) string {
 // are redacted. Safe to call multiple times; only the first call prints.
 func WarnIfProxied(w io.Writer) {
 	proxyWarningOnce.Do(func() {
-		if os.Getenv(EnvNoProxy) != "" {
+		if os.Getenv(EnvNoProxy) != "" || os.Getenv(EnvNoProxyWarning) != "" {
 			return
 		}
 		key, val := DetectProxyEnv()
diff --git a/shortcuts/im/im_messages_reply.go b/shortcuts/im/im_messages_reply.go
index 806ee739c..33c36ca55 100644
--- a/shortcuts/im/im_messages_reply.go
+++ b/shortcuts/im/im_messages_reply.go
@@ -29,11 +29,11 @@ var ImMessagesReply = common.Shortcut{
 		{Name: "content", Desc: "(one of --content/--text/--markdown/--image/--file/--video/--audio required) message content JSON"},
 		{Name: "text", Desc: "plain text message (auto-wrapped as JSON)"},
 		{Name: "markdown", Desc: "markdown text (auto-wrapped as post format with style optimization; image URLs auto-resolved)"},
-		{Name: "image", Desc: "image_key, local file path"},
-		{Name: "file", Desc: "file_key, local file path"},
-		{Name: "video", Desc: "video file_key, local file path; must be used together with --video-cover"},
-		{Name: "video-cover", Desc: "video cover image_key, local file path; required when using --video"},
-		{Name: "audio", Desc: "audio file_key, local file path"},
+		{Name: "image", Desc: "image_key or relative path to file"},
+		{Name: "file", Desc: "file_key or relative path to file"},
+		{Name: "video", Desc: "video file_key or relative path to file; must be used together with --video-cover"},
+		{Name: "video-cover", Desc: "video cover image_key or relative path to file; required when using --video"},
+		{Name: "audio", Desc: "audio file_key or relative path to file"},
 		{Name: "reply-in-thread", Type: "bool", Desc: "reply in thread (message appears in thread stream instead of main chat)"},
 		{Name: "idempotency-key", Desc: "idempotency key (prevents duplicate sends)"},
 	},
diff --git a/shortcuts/im/im_messages_send.go b/shortcuts/im/im_messages_send.go
index efaa54852..fb7a94451 100644
--- a/shortcuts/im/im_messages_send.go
+++ b/shortcuts/im/im_messages_send.go
@@ -33,11 +33,11 @@ var ImMessagesSend = common.Shortcut{
 		{Name: "text", Desc: "plain text message (auto-wrapped as JSON)"},
 		{Name: "markdown", Desc: "markdown text (auto-wrapped as post format with style optimization; image URLs auto-resolved)"},
 		{Name: "idempotency-key", Desc: "idempotency key (prevents duplicate sends)"},
-		{Name: "image", Desc: "image_key, local file path"},
-		{Name: "file", Desc: "file_key, local file path"},
-		{Name: "video", Desc: "video file_key, local file path; must be used together with --video-cover"},
-		{Name: "video-cover", Desc: "video cover image_key, local file path; required when using --video"},
-		{Name: "audio", Desc: "audio file_key, local file path"},
+		{Name: "image", Desc: "image_key or relative path to file"},
+		{Name: "file", Desc: "file_key or relative path to file"},
+		{Name: "video", Desc: "video file_key or relative path to file; must be used together with --video-cover"},
+		{Name: "video-cover", Desc: "video cover image_key or relative path to file; required when using --video"},
+		{Name: "audio", Desc: "audio file_key or relative path to file"},
 	},
 	DryRun: func(ctx context.Context, runtime *common.RuntimeContext) *common.DryRunAPI {
 		chatFlag := runtime.Str("chat-id")
@@ -81,10 +81,16 @@ var ImMessagesSend = common.Shortcut{
 		if desc != "" {
 			d.Desc(desc)
 		}
-		return d.
+		d = d.
 			POST("/open-apis/im/v1/messages").
 			Params(map[string]interface{}{"receive_id_type": receiveIdType}).
 			Body(body)
+
+		if chatFlag != "" {
+			d.Desc("dry-run validates request shape only — it does not verify that the selected identity is a member of the target chat; a real send can still fail with \"Bot/User can NOT be out of the chat\"")
+		}
+
+		return d
 	},
 	Validate: func(ctx context.Context, runtime *common.RuntimeContext) error {
 		chatFlag := runtime.Str("chat-id")