fix: MCP reconnect via tool passes only server_id to connect_server (#1385)

* fix: MCP reconnect via tool passes only server_id to connect_server

connect_server requires name, transport, command, args, env, and url
but the reconnect path in do_manage_mcp only passed the server_id,
causing a TypeError on every reconnect attempt. Mirror the pattern
used in mcp_routes.py reconnect_server.

* test: verify MCP reconnect passes full server config to connect_server

Mocks the MCP manager and DB to assert that do_manage_mcp reconnect
passes name, transport, command, args, env, and url — not just the
server_id.

tests/test_mcp_reconnect_args.py

@@ -0,0 +1,46 @@
+"""Verify that MCP reconnect via the agent tool passes full server metadata."""
+
+import asyncio
+import json
+from unittest.mock import AsyncMock, MagicMock, patch
+from types import SimpleNamespace
+
+
+def test_reconnect_passes_full_server_config():
+    """do_manage_mcp reconnect must pass name/transport/command/args/env/url."""
+    from src.tool_implementations import do_manage_mcp
+
+    fake_mcp = MagicMock()
+    fake_mcp.disconnect_server = AsyncMock()
+    fake_mcp.connect_server = AsyncMock(return_value=True)
+    fake_mcp.get_server_status = MagicMock(return_value={"tool_count": 3})
+
+    fake_srv = SimpleNamespace(
+        id="srv-123",
+        name="test-server",
+        transport="stdio",
+        command="/usr/bin/test",
+        args=json.dumps(["--flag"]),
+        env=json.dumps({"KEY": "val"}),
+        url=None,
+    )
+
+    fake_db = MagicMock()
+    fake_db.query.return_value.filter.return_value.first.return_value = fake_srv
+
+    with patch("src.tool_implementations.get_mcp_manager", return_value=fake_mcp), \
+         patch("core.database.SessionLocal", return_value=fake_db):
+        result = asyncio.run(do_manage_mcp(
+            json.dumps({"action": "reconnect", "server_id": "srv-123"})
+        ))
+
+    assert result["exit_code"] == 0
+    fake_mcp.connect_server.assert_called_once_with(
+        server_id="srv-123",
+        name="test-server",
+        transport="stdio",
+        command="/usr/bin/test",
+        args=["--flag"],
+        env={"KEY": "val"},
+        url=None,
+    )