{
  "title": "Vocabulary coverage estimator",
  "human_url": "https://happytails.ai/en/text-tools/vocabulary-coverage-estimator/",
  "agent_url": "https://happytails.ai/agents/en/text-tools/vocabulary-coverage-estimator/",
  "language": "en",
  "markdown_url": "https://happytails.ai/en/text-tools/vocabulary-coverage-estimator.md",
  "content": "Vocabulary coverage estimator\nCompare a passage against your explicit known-word list and separate token coverage from word-type coverage.\nHow can we improve this tool?\nReport a problem or share an idea.\nPlease leave out private information. Your message and the tool name go to our team via PostHog.\nHow to use Vocabulary coverage estimator\nPaste your own passage as plain text.\nChoose explicit matching or analysis settings.\nReview the bounded table and download complete JSON or CSV.\nUseful next steps\nConcordance reader\nLexical diversity analyzer\nEditorial style guide checker\nKnow exactly what is measured\nSupply one known word per line, up to 10000 words. Matching uses NFC normalization and the selected case setting. No stemming, translation, inflection inference or dictionary is used. An empty known list marks every word unknown. Coverage is a descriptive fraction, not a proficiency estimate.\nKeep the full report\nUse up to 500000 text characters and 20000 word tokens. Reports allow up to 10000 matches or repeated phrase groups. JSON and CSV preserve the full report, with bounded exports up to 40 million characters and 500000 CSV records. Analysis runs locally with a 10-second timeout. Preview search and sort cover the first 200 rows; copy returns the summary. Download the full report for every row. Your text is not uploaded. Offsets refer to the original UTF-16 text. Machine report keys and your content are preserved. Formula-protected CSV changes risky cell prefixes; import columns as text when preserving exact identifiers.",
  "content_format": "text/plain",
  "visibility": "public",
  "links": [
    {
      "name": "Concordance reader",
      "url": "https://happytails.ai/en/text-tools/concordance-reader/"
    },
    {
      "name": "Lexical diversity analyzer",
      "url": "https://happytails.ai/en/text-tools/lexical-diversity-analyzer/"
    },
    {
      "name": "Editorial style guide checker",
      "url": "https://happytails.ai/en/text-tools/editorial-style-guide-checker/"
    }
  ],
  "tool": {
    "id": "vocabulary-coverage-estimator",
    "category": "text-tools",
    "built": true,
    "requirements": "Supply one known word per line, up to 10000 words. Matching uses NFC normalization and the selected case setting. No stemming, translation, inflection inference or dictionary is used. An empty known list marks every word unknown. Coverage is a descriptive fraction, not a proficiency estimate. Use up to 500000 text characters and 20000 word tokens. Reports allow up to 10000 matches or repeated phrase groups. JSON and CSV preserve the full report, with bounded exports up to 40 million characters and 500000 CSV records. Analysis runs locally with a 10-second timeout. Preview search and sort cover the first 200 rows; copy returns the summary. Download the full report for every row. Your text is not uploaded.",
    "implementation": {
      "fields": [
        {
          "key": "knownWords",
          "label": "Known words, one per line",
          "value": "free\ntools",
          "type": "textarea",
          "maxLength": 200000
        },
        {
          "key": "caseMode",
          "label": "Case comparison",
          "value": "fold",
          "type": "select",
          "values": [
            "fold",
            "exact"
          ],
          "labels": {
            "fold": "Locale-aware lowercase",
            "exact": "Case-sensitive"
          }
        }
      ],
      "presentation": "metrics",
      "inputMaxLength": 500000,
      "inputErrorCode": "TEXT_DIAGNOSTICS_INPUT",
      "note": "Supply one known word per line, up to 10000 words. Matching uses NFC normalization and the selected case setting. No stemming, translation, inflection inference or dictionary is used. An empty known list marks every word unknown. Coverage is a descriptive fraction, not a proficiency estimate. Use up to 500000 text characters and 20000 word tokens. Reports allow up to 10000 matches or repeated phrase groups. JSON and CSV preserve the full report, with bounded exports up to 40 million characters and 500000 CSV records. Analysis runs locally with a 10-second timeout. Preview search and sort cover the first 200 rows; copy returns the summary. Download the full report for every row. Your text is not uploaded.",
      "experience": {
        "automatic": false,
        "single": false,
        "inputMaxLength": 500000,
        "inputMode": "text",
        "label": "Your text",
        "placeholder": "Type or paste your input…",
        "help": "Up to 500,000 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"
    }
  },
  "markdown": "# Vocabulary coverage estimator\n\n- Human page: https://happytails.ai/en/text-tools/vocabulary-coverage-estimator/\n- Markdown: https://happytails.ai/en/text-tools/vocabulary-coverage-estimator.md\n- Structured JSON: https://happytails.ai/agents/en/text-tools/vocabulary-coverage-estimator/index.json\n- Visibility: public\n\n## Tool capabilities\n\n| Property | Value |\n| --- | --- |\n| Tool ID | `vocabulary-coverage-estimator` |\n| Category | text-tools |\n| Implementation | Registered implementation. Registration alone is not a production-quality guarantee. |\n| Browser execution | Use the visible action or interactive controls. |\n| Browser processing | Browser; see tool notes for network behavior. |\n| HTTP API | Not callable through HTTP. |\n| Browser-agent interface | run_current_tool |\n\n### Implementation notes\n\nSupply one known word per line, up to 10000 words. Matching uses NFC normalization and the selected case setting. No stemming, translation, inflection inference or dictionary is used. An empty known list marks every word unknown. Coverage is a descriptive fraction, not a proficiency estimate. Use up to 500000 text characters and 20000 word tokens. Reports allow up to 10000 matches or repeated phrase groups. JSON and CSV preserve the full report, with bounded exports up to 40 million characters and 500000 CSV records. Analysis runs locally with a 10-second timeout. Preview search and sort cover the first 200 rows; copy returns the summary. Download the full report for every row. Your text is not uploaded.\n\n### Inputs and settings\n\nText input: Your text.\n\nExample or placeholder shown in the interface (not a validated fixture):\n\n```text\nType or paste your input…\n```\n\nUp to 500,000 characters. Review the settings before running.\n\n| Setting | Meaning | Control type | Default | Constraints |\n| --- | --- | --- | --- | --- |\n| `knownWords` | Known words, one per line | textarea | \"free\\ntools\" |  |\n| `caseMode` | Case comparison | select | \"fold\" | Allowed: fold, exact |\n\n### Browser-agent workflow\n\n1. Open the human page in a browser that supports WebMCP.\n2. Discover the interface exposed by that page; use its actual schema.\n3. Select files on the page first when the tool requires files.\n4. Call `run_current_tool` with valid input and settings.\n5. Inspect the returned result or error and the displayed output. Retrieve files from the displayed download links.\n\nCalls do not automatically copy or download results. Browser permissions still apply. Interface availability alone is not proof of successful execution.\n\n### Planning specification\n\nSupply one known word per line, up to 10000 words. Matching uses NFC normalization and the selected case setting. No stemming, translation, inflection inference or dictionary is used. An empty known list marks every word unknown. Coverage is a descriptive fraction, not a proficiency estimate. Use up to 500000 text characters and 20000 word tokens. Reports allow up to 10000 matches or repeated phrase groups. JSON and CSV preserve the full report, with bounded exports up to 40 million characters and 500000 CSV records. Analysis runs locally with a 10-second timeout. Preview search and sort cover the first 200 rows; copy returns the summary. Download the full report for every row. Your text is not uploaded.\n\nThis describes intended requirements. Use the implementation notes, interface schema and observed output to determine current support.\n\n### Complete machine-readable capability record\n\n```json\n{\n  \"id\": \"vocabulary-coverage-estimator\",\n  \"category\": \"text-tools\",\n  \"built\": true,\n  \"requirements\": \"Supply one known word per line, up to 10000 words. Matching uses NFC normalization and the selected case setting. No stemming, translation, inflection inference or dictionary is used. An empty known list marks every word unknown. Coverage is a descriptive fraction, not a proficiency estimate. Use up to 500000 text characters and 20000 word tokens. Reports allow up to 10000 matches or repeated phrase groups. JSON and CSV preserve the full report, with bounded exports up to 40 million characters and 500000 CSV records. Analysis runs locally with a 10-second timeout. Preview search and sort cover the first 200 rows; copy returns the summary. Download the full report for every row. Your text is not uploaded.\",\n  \"implementation\": {\n    \"fields\": [\n      {\n        \"key\": \"knownWords\",\n        \"label\": \"Known words, one per line\",\n        \"value\": \"free\\ntools\",\n        \"type\": \"textarea\",\n        \"maxLength\": 200000\n      },\n      {\n        \"key\": \"caseMode\",\n        \"label\": \"Case comparison\",\n        \"value\": \"fold\",\n        \"type\": \"select\",\n        \"values\": [\n          \"fold\",\n          \"exact\"\n        ],\n        \"labels\": {\n          \"fold\": \"Locale-aware lowercase\",\n          \"exact\": \"Case-sensitive\"\n        }\n      }\n    ],\n    \"presentation\": \"metrics\",\n    \"inputMaxLength\": 500000,\n    \"inputErrorCode\": \"TEXT_DIAGNOSTICS_INPUT\",\n    \"note\": \"Supply one known word per line, up to 10000 words. Matching uses NFC normalization and the selected case setting. No stemming, translation, inflection inference or dictionary is used. An empty known list marks every word unknown. Coverage is a descriptive fraction, not a proficiency estimate. Use up to 500000 text characters and 20000 word tokens. Reports allow up to 10000 matches or repeated phrase groups. JSON and CSV preserve the full report, with bounded exports up to 40 million characters and 500000 CSV records. Analysis runs locally with a 10-second timeout. Preview search and sort cover the first 200 rows; copy returns the summary. Download the full report for every row. Your text is not uploaded.\",\n    \"experience\": {\n      \"automatic\": false,\n      \"single\": false,\n      \"inputMaxLength\": 500000,\n      \"inputMode\": \"text\",\n      \"label\": \"Your text\",\n      \"placeholder\": \"Type or paste your input…\",\n      \"help\": \"Up to 500,000 characters. Review the settings before running.\",\n      \"action\": null\n    },\n    \"mode\": \"explicit\",\n    \"interactive\": false\n  },\n  \"execution\": \"Browser interface\",\n  \"api\": null,\n  \"browser_agent\": {\n    \"supported\": true,\n    \"name\": \"run_current_tool\",\n    \"discovery\": \"WebMCP on the human page in a supporting browser\",\n    \"verification\": \"See audit/API-AUDIT.md; availability is not verification\"\n  }\n}\n```\n\n## Page guide\n\nCompare a passage against your explicit known-word list and separate token coverage from word-type coverage.\n\nHow can we improve this tool?\n\nReport a problem or share an idea.\n\nPlease leave out private information. Your message and the tool name go to our team via PostHog.\n\n### How to use Vocabulary coverage estimator\n\n1. Paste your own passage as plain text.\n2. Choose explicit matching or analysis settings.\n3. Review the bounded table and download complete JSON or CSV.\n\n## Useful next steps\n\n- [Concordance reader](https://happytails.ai/en/text-tools/concordance-reader/) ([Markdown](https://happytails.ai/en/text-tools/concordance-reader.md))\n\n- [Lexical diversity analyzer](https://happytails.ai/en/text-tools/lexical-diversity-analyzer/) ([Markdown](https://happytails.ai/en/text-tools/lexical-diversity-analyzer.md))\n\n- [Editorial style guide checker](https://happytails.ai/en/text-tools/editorial-style-guide-checker/) ([Markdown](https://happytails.ai/en/text-tools/editorial-style-guide-checker.md))\n\n## Know exactly what is measured\n\nSupply one known word per line, up to 10000 words. Matching uses NFC normalization and the selected case setting. No stemming, translation, inflection inference or dictionary is used. An empty known list marks every word unknown. Coverage is a descriptive fraction, not a proficiency estimate.\n\n### Keep the full report\n\nUse up to 500000 text characters and 20000 word tokens. Reports allow up to 10000 matches or repeated phrase groups. JSON and CSV preserve the full report, with bounded exports up to 40 million characters and 500000 CSV records. Analysis runs locally with a 10-second timeout. Preview search and sort cover the first 200 rows; copy returns the summary. Download the full report for every row. Your text is not uploaded. Offsets refer to the original UTF-16 text. Machine report keys and your content are preserved. Formula-protected CSV changes risky cell prefixes; import columns as text when preserving exact identifiers.\n"
}