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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

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draw_hierarchy

act imperative

Draw a tree: section outlines, org charts, taxonomies, "chapter -> sections -> key points". Use this when the structure is strictly nested (every item has one parent). If items connect to each other in more than one direction, use draw_graph instead. Nest with "children" to any depth. Keep the whole tree under 40 nodes — for a long document, produce a draw_board with one hierarchy panel per major section instead. Example: {"root":{"label":"Chapter 3","children":[{"label":"Method","children":[{"label":"Sampling"}]},{"label":"Results"}]},"direction":"TD"}

Input schema

Property	Type	Required	Description
`title`	string	no	—
`root`	—	yes	—
`direction`	string	no	TD = top-down. LR reads better for deep outlines.
`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

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "title": {
      "type": "string"
    },
    "root": {
      "$ref": "#/$defs/__schema0"
    },
    "direction": {
      "description": "TD = top-down. LR reads better for deep outlines.",
      "default": "TD",
      "type": "string",
      "enum": [
        "TD",
        "LR"
      ]
    },
    "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": [
    "root"
  ],
  "$defs": {
    "__schema0": {
      "type": "object",
      "properties": {
        "label": {
          "description": "Short — under about six words.",
          "type": "string"
        },
        "children": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/__schema0"
          }
        }
      },
      "required": [
        "label"
      ]
    }
  },
  "additionalProperties": false
}

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