diff --git a/src/pumpfun_cli/commands/launch.py b/src/pumpfun_cli/commands/launch.py
index 5e32549..ec0cd39 100644
--- a/src/pumpfun_cli/commands/launch.py
+++ b/src/pumpfun_cli/commands/launch.py
@@ -19,6 +19,12 @@ def launch(
 ):
     """Launch a new token on pump.fun (create_v2 + extend_account)."""
     state = ctx.obj
+    if not name or not name.strip():
+        error("Token name cannot be empty.")
+    if not ticker or not ticker.strip():
+        error("Token ticker cannot be empty.")
+    if not desc or not desc.strip():
+        error("Token description cannot be empty.")
     if not state or not state.rpc:
         error("RPC endpoint not configured.", hint="Run: pumpfun config set rpc <url>")
 
diff --git a/tests/test_commands/test_launch_cmd.py b/tests/test_commands/test_launch_cmd.py
new file mode 100644
index 0000000..d990536
--- /dev/null
+++ b/tests/test_commands/test_launch_cmd.py
@@ -0,0 +1,28 @@
+from unittest.mock import Mock
+
+import pytest
+from typer.testing import CliRunner
+
+from pumpfun_cli.cli import app
+
+runner = CliRunner()
+
+
+@pytest.mark.parametrize(("name", "ticker", "desc", "expected_error"), [
+    ("", "TST", "test", "token name cannot be empty."),
+    ("   ", "TST", "test", "token name cannot be empty."),
+    ("MyToken", "", "test", "token ticker cannot be empty."),
+    ("MyToken", "   ", "test", "token ticker cannot be empty."),
+    ("MyToken", "TST", "", "token description cannot be empty."),
+    ("MyToken", "TST", "   ", "token description cannot be empty."),
+])
+def test_launch_rejects_empty_inputs(tmp_path, monkeypatch, name, ticker, desc, expected_error):
+    """launch rejects empty or whitespace-only name, ticker, or description."""
+    monkeypatch.setenv("XDG_CONFIG_HOME", str(tmp_path))
+    launch_token_mock = Mock(side_effect=AssertionError("launch_token must not be called for invalid input"))
+    monkeypatch.setattr("pumpfun_cli.commands.launch.launch_token", launch_token_mock)
+
+    result = runner.invoke(app, ["launch", "--name", name, "--ticker", ticker, "--desc", desc])
+    assert result.exit_code != 0
+    assert expected_error in result.output.lower()
+    launch_token_mock.assert_not_called()
\ No newline at end of file