web-mcp-extending-excalidraw.vercel.app
A whiteboard that gets better when a human and an agent draw on it together.
First seen 2026-11-05 · Last seen 2026-11-05 · Source: webmcp.com
Answer 4 · Act 21 · Transact 0 · Score: Not yet scored
Tool inspector
duplicate_elements
Copy existing elements and place the copies somewhere else. Use this to repeat a shape or a whole diagram instead of rebuilding it call by call — "another one of these", "copy that flowchart and change the labels", "three more of this box". Arrows between the copied elements are re-bound to the COPIES, so the duplicate is independent: editing or moving it does not disturb the original. Text inside a copied shape comes along automatically. Returns "idMap" (original id -> new id) so you can immediately restyle or retext the copy. Example: {"ids":["abc123"],"placement":{"mode":"next_to","refId":"abc123","side":"right"}}
Input schema
| Property | Type | Required | Description |
|---|---|---|---|
ids |
array | yes | Elements to copy. Get them from get_selection, get_scene or find_elements. |
count |
integer | no | How many copies to make. Each is offset further along. |
placement |
— | no | Where to put it. Omit for the centre of the human's current view. {"mode":"next_to","refId":"<id>","side":"right"} places it beside an existing element; {"mode":"free_space"} puts it clear of everything already drawn. |
Raw JSON schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"properties": {
"ids": {
"description": "Elements to copy. Get them from get_selection, get_scene or find_elements.",
"minItems": 1,
"type": "array",
"items": {
"type": "string"
}
},
"count": {
"description": "How many copies to make. Each is offset further along.",
"default": 1,
"type": "integer",
"minimum": 1,
"maximum": 10
},
"placement": {
"description": "Where to put it. Omit for the centre of the human's current view. {\"mode\":\"next_to\",\"refId\":\"<id>\",\"side\":\"right\"} places it beside an existing element; {\"mode\":\"free_space\"} puts it clear of everything already drawn.",
"anyOf": [
{
"type": "object",
"properties": {
"mode": {
"type": "string",
"const": "viewport"
}
},
"required": [
"mode"
]
},
{
"type": "object",
"properties": {
"mode": {
"type": "string",
"const": "next_to"
},
"refId": {
"type": "string"
},
"side": {
"type": "string",
"enum": [
"right",
"below",
"left",
"above"
]
},
"gap": {
"type": "number"
}
},
"required": [
"mode",
"refId"
]
},
{
"type": "object",
"properties": {
"mode": {
"type": "string",
"const": "free_space"
}
},
"required": [
"mode"
]
},
{
"type": "object",
"properties": {
"mode": {
"type": "string",
"const": "absolute"
},
"x": {
"type": "number"
},
"y": {
"type": "number"
}
},
"required": [
"mode",
"x",
"y"
]
}
]
}
},
"required": [
"ids"
],
"additionalProperties": false
}
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