diff --git a/tools/server/public_simplechat/tooljs.mjs b/tools/server/public_simplechat/tooljs.mjs
index cfbdc61e56..1796bfaa2b 100644
--- a/tools/server/public_simplechat/tooljs.mjs
+++ b/tools/server/public_simplechat/tooljs.mjs
@@ -1,40 +1,83 @@
 //@ts-check
-// Helpers to handle tools/functions calling
+// DANGER DANGER DANGER - Simple and Stupid - Use from a discardable VM only
+// Helpers to handle tools/functions calling wrt
+// * javascript interpreter
+// * simple arithmatic calculator
 // by Humans for All
 //
 
 
-let metas = [
-    {
-        "type":"function",
-        "function":{
+let js_meta = {
+        "type": "function",
+        "function": {
             "name": "javascript",
-            "description":"Runs code in an javascript interpreter and returns the result of the execution after 60 seconds.",
-            "parameters":{
-                "type":"object",
-                "properties":{
-                    "code":{
-                        "type":"string",
-                        "description":"The code to run in the javascript interpreter."
+            "description": "Runs code in an javascript interpreter and returns the result of the execution after few seconds",
+            "parameters": {
+                "type": "object",
+                "properties": {
+                    "code": {
+                        "type": "string",
+                        "description": "The code to run in the javascript interpreter."
                     }
                 },
-                "required":["code"]
+                "required": ["code"]
             }
         }
     }
-]
 
 
 /**
  * Implementation of the javascript interpretor logic. Minimal skeleton for now.
+ * ALERT: Has access to the javascript environment and can mess with it and beyond
  * @param {any} obj
  */
-function tool_run(obj) {
+function js_run(obj) {
     let func = new Function(obj["code"])
     func()
 }
 
-let tswitch = {
-    "javascript": tool_run,
+
+let calc_meta = {
+        "type": "function",
+        "function": {
+            "name": "simple_calculator",
+            "description": "Calculates the provided arithmatic expression using javascript interpreter and returns the result of the execution after few seconds",
+            "parameters": {
+                "type": "object",
+                "properties": {
+                    "arithexpr":{
+                        "type":"string",
+                        "description":"The arithmatic expression that will be calculated using javascript interpreter."
+                    }
+                },
+                "required": ["arithexpr"]
+            }
+        }
+    }
+
+
+/**
+ * Implementation of the simple calculator logic. Minimal skeleton for now.
+ * ALERT: Has access to the javascript environment and can mess with it and beyond
+ * @param {any} obj
+ */
+function calc_run(obj) {
+    let func = new Function(obj["arithexpr"])
+    func()
+}
+
+
+/**
+ * @type {Object<string, Object>}
+ */
+export let tc_switch = {
+    "javascript": {
+        "handler": js_run,
+        "meta": js_meta
+    },
+    "simple_calculator": {
+        "handler": calc_run,
+        "meta": calc_meta
+    }
 }
 
diff --git a/tools/server/public_simplechat/tools.mjs b/tools/server/public_simplechat/tools.mjs
index 6d0b375447..ba80e30a91 100644
--- a/tools/server/public_simplechat/tools.mjs
+++ b/tools/server/public_simplechat/tools.mjs
@@ -1,7 +1,29 @@
 //@ts-check
-// Helpers to handle tools/functions calling
+// DANGER DANGER DANGER - Simple and Stupid - Use from a discardable VM only
+// Helpers to handle tools/functions calling in a direct and dangerous way
 // by Humans for All
 //
 
 
-import * as tjs from './tooljs.mjs'
\ No newline at end of file
+import * as tjs from './tooljs.mjs'
+
+
+/**
+ * @type {Object<string,Object>}
+ */
+let tc_switch = {}
+
+export function setup() {
+    for (const key in tjs.tc_switch) {
+        tc_switch[key] = tjs.tc_switch[key]
+    }
+}
+
+export function meta() {
+    let tools = []
+    for (const key in tc_switch) {
+        tools.push(tc_switch[key]["meta"])
+    }
+    return tools
+}
+