Number line activity builder

Open Number line activity builder on Happytails.ai. This view has the same page content and links, with explicit tool capabilities. Read the processing notes before using a tool.

Tool capabilities

{
  "id": "number-line-activity-builder",
  "category": "education-tools",
  "built": true,
  "requirements": "Start and end are bounded to ±1,000,000, with 2 to 201 ticks, a 60 to 260 mm line, up to 26 points, 20 jumps and 20,000 item characters. Hidden point values use letters and jump-size labels are omitted; tick values remain visible. Print at 100% to preserve the chosen line length. The tool cannot verify printer scaling.",
  "implementation": {
    "fields": [
      {
        "key": "start",
        "label": "Start",
        "value": "0",
        "type": "text"
      },
      {
        "key": "end",
        "label": "End",
        "value": "2",
        "type": "text"
      },
      {
        "key": "step",
        "label": "Tick step",
        "value": "1/4",
        "type": "text"
      },
      {
        "key": "lengthMm",
        "label": "Line length (mm)",
        "value": 180,
        "type": "number",
        "min": 60,
        "max": 260,
        "step": 1
      },
      {
        "key": "tickFormat",
        "label": "Tick labels",
        "value": "Mixed numbers",
        "type": "select",
        "values": [
          "Fractions",
          "Mixed numbers",
          "Decimals"
        ],
        "labels": {
          "Fractions": "Labels as fractions"
        }
      },
      {
        "key": "labelEvery",
        "label": "Label every Nth tick (0 for automatic)",
        "value": 0,
        "type": "number",
        "min": 0,
        "max": 100,
        "step": 1
      },
      {
        "key": "hideAnswers",
        "label": "Hide point values (letters on the worksheet)",
        "value": true,
        "type": "checkbox"
      }
    ],
    "registrationFamily": "learning-activities-reference",
    "presentation": "metrics",
    "inputMaxLength": 20000,
    "inputErrorCode": "LEARNING_ACTIVITIES_REFERENCE_TOO_LONG",
    "note": "Enter points and jumps using fractions, mixed numbers or decimals. Hidden point labels use letters and jump sizes are removed; tick values stay visible. Print both SVGs at 100% to preserve the chosen line length.",
    "experience": {
      "automatic": false,
      "single": false,
      "inputMaxLength": 20000,
      "inputMode": "text",
      "label": "Your text",
      "placeholder": "Type or paste your input…",
      "help": "Up to 20,000 characters. Review the settings before running.",
      "helpParts": [
        "Up to 20,000 characters.",
        "Review the settings before running."
      ],
      "action": null
    },
    "mode": "explicit",
    "interactive": false
  },
  "execution": "Browser interface",
  "api": null,
  "browser_agent": {
    "supported": true,
    "name": "run_current_tool",
    "discovery": "WebMCP on the human page in a supporting browser",
    "verification": "See audit/API-AUDIT.md; availability is not verification"
  }
}

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