diff --git a/src/Lib/default/local_tool_connectors/MispConnector.php b/src/Lib/default/local_tool_connectors/MispConnector.php
index 473573a..a021839 100644
--- a/src/Lib/default/local_tool_connectors/MispConnector.php
+++ b/src/Lib/default/local_tool_connectors/MispConnector.php
@@ -122,6 +122,11 @@ class MispConnector extends CommonConnectorTools
             'type' => 'boolean'
         ],
     ];
+    public $settingsPlaceholder = [
+        'url' => 'https://your.misp.intance',
+        'authkey' => '',
+        'skip_ssl' => '0',
+    ];
 
     public function addSettingValidatorRules($validator)
     {
diff --git a/src/Lib/default/local_tool_connectors/SkeletonConnectorExample.php b/src/Lib/default/local_tool_connectors/SkeletonConnectorExample.php
index ce9b62d..362c514 100644
--- a/src/Lib/default/local_tool_connectors/SkeletonConnectorExample.php
+++ b/src/Lib/default/local_tool_connectors/SkeletonConnectorExample.php
@@ -46,6 +46,22 @@ class SkeletonConnector extends CommonConnectorTools
             'redirect' => 'serverSettingsAction'
         ]
     ];
+    public $settings = [
+        'url' => [
+            'type' => 'text'
+        ],
+        'authkey' => [
+            'type' => 'text'
+        ],
+        'skip_ssl' => [
+            'type' => 'boolean'
+        ],
+    ];
+    public $settingsPlaceholder = [
+        'url' => 'https://your.url',
+        'authkey' => '',
+        'skip_ssl' => '0',
+    ];
 
     public function health(Object $connection): array
     {
diff --git a/src/Model/Table/LocalToolsTable.php b/src/Model/Table/LocalToolsTable.php
index ac29bf9..64d6168 100644
--- a/src/Model/Table/LocalToolsTable.php
+++ b/src/Model/Table/LocalToolsTable.php
@@ -143,7 +143,8 @@ class LocalToolsTable extends AppTable
                 'connector' => $connector_type,
                 'connector_version' => $connector_class->version,
                 'connector_description' => $connector_class->description,
-                'connector_settings' => $connector_class->settings ?? []
+                'connector_settings' => $connector_class->settings ?? [],
+                'connector_settings_placeholder' => $connector_class->settingsPlaceholder ?? [],
             ];
             if ($includeConnections) {
                 $connector['connections'] = $this->healthCheck($connector_type, $connector_class);
diff --git a/templates/LocalTools/add.php b/templates/LocalTools/add.php
index 184f0e6..5197f21 100644
--- a/templates/LocalTools/add.php
+++ b/templates/LocalTools/add.php
@@ -22,7 +22,8 @@
                     'codemirror' => [
                         'height' => '10rem',
                         'hints' => $connectors[0]['connector_settings']
-                    ]
+                    ],
+                    'placeholder' => json_encode($connectors[0]['connector_settings_placeholder'], JSON_FORCE_OBJECT | JSON_PRETTY_PRINT)
                 ],
                 [
                     'field' => 'description',
diff --git a/templates/layout/default.php b/templates/layout/default.php
index 849592e..59d2efe 100644
--- a/templates/layout/default.php
+++ b/templates/layout/default.php
@@ -52,6 +52,7 @@ $sidebarOpen = $loggedUser->user_settings_by_name_with_fallback['ui.sidebar.expa
     <?= $this->Html->script('CodeMirror/addon/lint/json-lint') ?>
     <?= $this->Html->script('CodeMirror/addon/edit/matchbrackets') ?>
     <?= $this->Html->script('CodeMirror/addon/edit/closebrackets') ?>
+    <?= $this->Html->script('CodeMirror/addon/display/placeholder') ?>
     <?= $this->Html->css('CodeMirror/codemirror') ?>
     <?= $this->Html->css('CodeMirror/codemirror-additional') ?>
     <?= $this->Html->css('CodeMirror/addon/hint/show-hint') ?>
diff --git a/webroot/css/CodeMirror/codemirror-additional.css b/webroot/css/CodeMirror/codemirror-additional.css
index 0c62e18..4399c1a 100644
--- a/webroot/css/CodeMirror/codemirror-additional.css
+++ b/webroot/css/CodeMirror/codemirror-additional.css
@@ -26,4 +26,8 @@
 
 .CodeMirror-hints {
     z-index: 1060 !important; /* Make sure hint is above modal */
+}
+
+.CodeMirror pre.CodeMirror-placeholder {
+    color: #999; 
 }
\ No newline at end of file
diff --git a/webroot/js/CodeMirror/addon/display/placeholder.js b/webroot/js/CodeMirror/addon/display/placeholder.js
new file mode 100644
index 0000000..d8e2dbd
--- /dev/null
+++ b/webroot/js/CodeMirror/addon/display/placeholder.js
@@ -0,0 +1,78 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: https://codemirror.net/LICENSE
+
+(function (mod) {
+    if (typeof exports == "object" && typeof module == "object") // CommonJS
+        mod(require("../../lib/codemirror"));
+    else if (typeof define == "function" && define.amd) // AMD
+        define(["../../lib/codemirror"], mod);
+    else // Plain browser env
+        mod(CodeMirror);
+})(function (CodeMirror) {
+    CodeMirror.defineOption("placeholder", "", function (cm, val, old) {
+        var prev = old && old != CodeMirror.Init;
+        if (val && !prev) {
+            cm.on("blur", onBlur);
+            cm.on("change", onChange);
+            cm.on("swapDoc", onChange);
+            CodeMirror.on(cm.getInputField(), "compositionupdate", cm.state.placeholderCompose = function () { onComposition(cm) })
+            onChange(cm);
+        } else if (!val && prev) {
+            cm.off("blur", onBlur);
+            cm.off("change", onChange);
+            cm.off("swapDoc", onChange);
+            CodeMirror.off(cm.getInputField(), "compositionupdate", cm.state.placeholderCompose)
+            clearPlaceholder(cm);
+            var wrapper = cm.getWrapperElement();
+            wrapper.className = wrapper.className.replace(" CodeMirror-empty", "");
+        }
+
+        if (val && !cm.hasFocus()) onBlur(cm);
+    });
+
+    function clearPlaceholder(cm) {
+        if (cm.state.placeholder) {
+            cm.state.placeholder.parentNode.removeChild(cm.state.placeholder);
+            cm.state.placeholder = null;
+        }
+    }
+    function setPlaceholder(cm) {
+        clearPlaceholder(cm);
+        var elt = cm.state.placeholder = document.createElement("pre");
+        elt.style.cssText = "height: 0; overflow: visible";
+        elt.style.direction = cm.getOption("direction");
+        elt.className = "CodeMirror-placeholder CodeMirror-line-like";
+        var placeHolder = cm.getOption("placeholder")
+        if (typeof placeHolder == "string") placeHolder = document.createTextNode(placeHolder)
+        elt.appendChild(placeHolder)
+        cm.display.lineSpace.insertBefore(elt, cm.display.lineSpace.firstChild);
+    }
+
+    function onComposition(cm) {
+        setTimeout(function () {
+            var empty = false
+            if (cm.lineCount() == 1) {
+                var input = cm.getInputField()
+                empty = input.nodeName == "TEXTAREA" ? !cm.getLine(0).length
+                    : !/[^\u200b]/.test(input.querySelector(".CodeMirror-line").textContent)
+            }
+            if (empty) setPlaceholder(cm)
+            else clearPlaceholder(cm)
+        }, 20)
+    }
+
+    function onBlur(cm) {
+        if (isEmpty(cm)) setPlaceholder(cm);
+    }
+    function onChange(cm) {
+        var wrapper = cm.getWrapperElement(), empty = isEmpty(cm);
+        wrapper.className = wrapper.className.replace(" CodeMirror-empty", "") + (empty ? " CodeMirror-empty" : "");
+
+        if (empty) setPlaceholder(cm);
+        else clearPlaceholder(cm);
+    }
+
+    function isEmpty(cm) {
+        return (cm.lineCount() === 1) && (cm.getLine(0) === "");
+    }
+});