docs-masked
docs-masked
Anonimización local de documentos antes de enviarlos al modelo de lenguaje — y restauración después de la respuesta.
El documento nunca sale de la máquina en su forma original. Los datos personales se reemplazan con etiquetas estables (#PERSON_1#, #PHONE_2#, #ADDRESS_1#), solo el texto con etiquetas se envía al modelo, y la respuesta recibida se restaura localmente mediante la caja fuerte de correspondencias.
документ ──▶ маска ──▶ контроль утечки ──▶ модель ──▶ обратная подстановка
локально локально сеть локальноFunciona como un skill para Claude Code, como un servidor MCP para cualquier otro agente y como una utilidad de línea de comandos normal.
Cómo funciona
1. Máscara. El documento se descompone en fragmentos de texto: párrafos, celdas, nodos de marcado. En cada uno se encuentran datos personales, cada valor recibe una etiqueta estable. La misma persona recibe la misma etiqueta en todo el documento, incluyendo variantes de caso e iniciales: «Иванов Иван Иванович», «Иванову» e «Иванов И.И.» — todo es un mismo #PERSON_1#.
2. Control de fugas. El texto enmascarado se vuelve a pasar por todos los detectores más un paso paranoico: cualquier @, cualquier cadena de siete o más dígitos, cualquier conjunto similar a un teléfono. Si queda algo, el envío se bloquea con una excepción, no con una advertencia en el registro.
3. Envío. Solo el texto con etiquetas sale al exterior. El único punto de salida a la red es la función llm.send(), y está obligada a realizar una verificación antes de la solicitud. Cada envío se registra en el archivo ~/.pii_shield/egress.jsonl: hora, proveedor, modelo, tamaño, sha256, estado de verificación. El contenido no se registra.
4. Restauración. La respuesta del modelo pasa por la caja fuerte: las etiquetas se reemplazan por los originales. Para nombres completos se restaura el caso nominativo — si en el documento la persona se menciona solo como «Кузнецову Ивану Петровичу», en la respuesta se convertirá en «Кузнецов Иван Петрович».
Related MCP server: Doc Sanitizer MCP Server
Instalación
git clone https://github.com/kpshinnik/docs_masked.git ~/.docs_masked/src
cd ~/.docs_masked/src && ./install.shEl script instalará las dependencias, colocará el skill en ~/.claude/skills/docs-masked e imprimirá un fragmento de configuración MCP listo. Detalles y variantes en docs/INSTALL.md.
Conexión al agente
Método | Para quién | Cómo |
Skill | Claude Code, Claude.ai |
|
Servidor MCP | Cursor, Windsurf, Codex CLI, Continue, Zed, Cline, Claude Desktop |
|
CLI y regla | todo lo demás | comandos en la terminal más |
Paso a paso para cada harness — docs/HARNESSES.md.
El servidor MCP está escrito sin dependencias: solo necesita python3. Ofrece seis herramientas — mask_text, unmask_text, verify_text, scan_document, mask_document, unmask_document.
Uso
docs-masked scan договор.docx # что будет скрыто
docs-masked mask договор.docx # маска + сейф
docs-masked report договор.docx --open # посмотреть глазами
docs-masked ask договор.docx -p "Найди риски по срокам"
docs-masked unmask договор.masked.docx --vault договор.docx.vault.jsonComandos
Comando | Qué hace |
| Muestra qué se enmascarará. El archivo no se modifica, la red no se toca. |
| Copia anonimizada en el mismo formato más el archivo de la caja fuerte. |
| Devuelve los originales. |
| Verifica que no queden datos personales. |
| Ciclo completo: máscara → verificación → modelo → respuesta restaurada. |
| Página HTML de revisión: cada reemplazo en contexto, valores ocultos. |
| Autocomprobación del ciclo. |
Lista completa de banderas — skills/docs-masked/references/cli.md.
Qué se reconoce
Nombres completos en cualquier caso (rusos, latinos, transliterados), organizaciones, direcciones, correos electrónicos, teléfonos, pasaporte y código de unidad, SNILS, INN, OGRN, KPP, BIK, cuentas bancarias, tarjetas bancarias, IBAN, pólizas de seguro médico obligatorio, licencias de conducir, matrículas de automóviles, direcciones IP, @никнеймы, fechas de nacimiento y emisión de documentos, códigos de requisitos (OKTMO, OKPO, KBK), más sus propias cadenas.
Los identificadores se verifican realmente: suma de control de SNILS, dígitos de control de INN y OGRN, algoritmo de Luhn para tarjetas, mod-97 para IBAN. Tabla completa — references/coverage.md.
Formatos
Formato | Lectura | Escritura en el lugar |
| sí | sí |
| sí | sí, conservando el formato |
| sí | sí |
| sí | sí |
| sí | sí |
| sí | sí |
| sí | con la bandera |
| sí | no (solo macOS, mediante |
DOCX se recorre mediante XML, no a través de document.paragraphs: de lo contrario se pierden párrafos dentro de campos de contenido y leyendas — en un contrato real, por eso desaparecía una columna entera del bloque de requisitos. En las tablas, el encabezado de columna se usa como contexto: la celda 500100732259 por sí sola es indistinguible de un número aleatorio, pero en la columna «ИНН» se reconoce con seguridad.
API de Python
from pii_shield import ask_document
res = ask_document("договор.docx", "Составь резюме и найди риски",
provider="anthropic")
print(res.answer) # имена уже восстановленыControl manual de cada paso:
from pii_shield import mask_text, assert_clean, unmask_text
r = mask_text(raw) # r.text — с тегами, r.vault — сейф
assert_clean(r.text) # LeakGuardError, если что-то осталось
answer = call_model(r.text) # наружу уходит только маска
final, unknown = unmask_text(answer, r.vault, mode="canonical")Más detalles — references/api.md.
Caja fuerte de correspondencias
La caja fuerte es lo único que vincula las etiquetas con los originales. Sin ella, la restauración es imposible.
Se escribe junto al documento como
<archivo>.vault.json, permisos0600.Se cifra con la bandera
--pass-env(scrypt + Fernet).Almacena la forma canónica, todas las variantes encontradas y un registro de apariciones en el orden del documento — gracias al registro, la restauración exacta devuelve la forma de palabra original, no la canónica.
Está incluido en
.gitignore. No lo commitée.
Precisión y límites
La herramienta está diseñada para errar en el lado seguro: es mejor enmascarar de más que pasar por alto. Lo que hay que saber:
PDF escaneado sin capa de texto no se procesa — se necesita OCR.
Personas con el mismo apellido sin iniciales reciben etiquetas separadas, no se fusionan en una sola persona.
Un número desnudo sin pistas puede no ser reconocido como identificador — pero el paso paranoico igualmente no dejará salir ese texto.
Nombres latinos arbitrarios sin terminaciones eslavas y sin tratamiento (
Mr.,Dr.) no se reconocen: capturar cualquier par de palabras en mayúscula causaría más daño que beneficio.
En un documento crítico, vale la pena revisar docs-masked report visualmente una vez.
Desarrollo
python3 -m pytest tests/ -q # тесты
python3 -m pii_shield.cli selftest
python3 samples/make_samples.py # пересоздать тестовые документыLos invariantes que no se deben romper se enumeran en AGENTS.md. Todo en samples/ es sintético; el directorio examples/ está reservado para sus documentos locales y no se incluye en el repositorio.
Licencia
MIT.
Available Tools
6 toolsmask_documentB
Создать обезличенную копию файла в том же формате и сейф соответствий рядом. Для DOCX/XLSX сохраняется форматирование, для PDF доступно физическое вымарывание (pdf_redact).
| Name | Required | Description | Default |
|---|---|---|---|
| out | No | куда положить копию | |
| path | Yes | ||
| allowlist | No | строки, которые маскировать не нужно | |
| mask_urls | No | скрывать ссылки | |
| tag_style | No | формат тега: #PERSON_1# | [[PERSON_1]] | <PERSON_1> | |
| pdf_redact | No | ||
| vault_path | No | ||
| extra_terms | No | дополнительные строки для маскирования | |
| include_text | No | вернуть замаскированный текст в ответе | |
| mask_all_dates | No | скрывать все даты, не только даты рождения | |
| aggressive_names | No | скрывать одиночные слова, похожие на фамилии |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It explains that the tool creates a copy (non-destructive), preserves formatting for certain types, and has a PDF redaction option. However, it does not describe what the 'safe of matches' is, whether it modifies the original, or any other behavioral aspects like idempotency or authorization requirements. Some transparency but incomplete.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is short at two sentences, with the main action in the first sentence. It avoids clutter but omits important details like the purpose of the 'safe of matches'. It is reasonably concise, though the second sentence could be more integrated.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool has 11 parameters covering many masking options and no output schema, the description is insufficient. It explains basic file copying and format handling but fails to describe the extensive configuration options (allowlist, URL/date masking, name detection) or the structure of the 'safe of matches' output. The agent would need to rely heavily on parameter descriptions, which are incomplete (only 73% coverage).
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 73%, so the baseline is 3. The description adds no extra parameter details beyond what the schema already provides. It mentions PDF redaction (pdf_redact) but doesn't elaborate on other parameters like allowlist, out, or vault_path. Thus the description does not enhance parameter semantics.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the primary action: creating an anonymized copy of a file and a safety mapping. It specifies different behaviors for DOCX/XLSX vs PDF, adding context about format support. However, it does not explicitly distinguish from sibling tools like mask_text or unmask_document, though the document focus is implied.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides no guidance on when to use this tool versus its siblings such as mask_text for text strings or scan_document for scanning. It lacks any conditions, prerequisites, or recommended use cases, leaving the agent to infer applicability solely from the tool name.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
mask_textA
Заменить персональные данные в тексте на устойчивые теги (#PERSON_1#, #PHONE_2#). Вызывай это ДО того, как отправишь чужой текст куда-либо. Возвращает vault_id для обратной подстановки.
| Name | Required | Description | Default |
|---|---|---|---|
| text | Yes | ||
| allowlist | No | строки, которые маскировать не нужно | |
| mask_urls | No | скрывать ссылки | |
| tag_style | No | формат тега: #PERSON_1# | [[PERSON_1]] | <PERSON_1> | |
| extra_terms | No | дополнительные строки для маскирования | |
| mask_all_dates | No | скрывать все даты, не только даты рождения | |
| aggressive_names | No | скрывать одиночные слова, похожие на фамилии |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden. It discloses that it returns a vault_id for reverse substitution, but does not explain whether the operation is destructive, reversible beyond substitution, or has any side effects like logging or API rate limits.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is extremely concise with two sentences: the first explains what the tool does, the second gives critical timing advice. Every sentence adds value with no redundancy.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the parameter richness (7 params, 86% schema coverage) and lack of output schema, the description adequately covers the main purpose and usage timing. It could improve by mentioning return value structure or error states, but it is sufficient for an agent to correctly select and invoke the tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 86%, so the baseline is 3. The description does not add extra meaning beyond the schema's descriptions (e.g., the allowlist, tag_style formats are already documented). The only added value is the overall workflow context, not parameter-specific details.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the verb 'replace' and resource 'personal data in text', specifies the output format of stable tags like #PERSON_1#, and distinguishes itself from siblings like unmask_text and mask_document by focusing on text-level masking.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description explicitly says 'Call this BEFORE sending someone else's text anywhere', providing clear timing guidance. However, it does not explicitly state when not to use it or describe alternative tools like verify_text or mask_document for comparison.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
scan_documentA
Показать, что будет скрыто в файле: количество и типы находок. Файл не изменяется, оригиналы значений не возвращаются. Форматы: .csv, .doc, .docx, .htm, .html, .ini, .json, .log, .markdown, .md, .odt, .pdf, .rst, .rtf, .srt, .tex, .tsv, .txt, .wordml, .xhtml, .xlsm, .xlsx, .yaml, .yml
| Name | Required | Description | Default |
|---|---|---|---|
| path | Yes | ||
| allowlist | No | строки, которые маскировать не нужно | |
| mask_urls | No | скрывать ссылки | |
| tag_style | No | формат тега: #PERSON_1# | [[PERSON_1]] | <PERSON_1> | |
| extra_terms | No | дополнительные строки для маскирования | |
| mask_all_dates | No | скрывать все даты, не только даты рождения | |
| aggressive_names | No | скрывать одиночные слова, похожие на фамилии |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden. It explicitly states the file is not modified and original values are not returned, which are key behavioral traits for a scan tool. It also lists supported formats, providing additional transparency.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is two sentences, front-loaded with the main purpose and key guarantees, followed by a compact list of supported formats. No extraneous words.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
The description explains the tool's output nature (counts and types, no original values) but lacks a detailed return structure or error handling expectations. Given no output schema, it could be more explicit, but for a scan tool with 7 params, the provided information is reasonably complete.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 86% (6/7 parameters have descriptions), so the schema already explains parameter meanings. The description itself does not add parameter details beyond noting file formats, which corresponds to the 'path' parameter but is already partially covered by the schema. Baseline 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description uses a specific verb ('Показать' - show) and resource ('что будет скрыто в файле'), clearly indicating a preview/scan function that counts and types findings. It distinguishes from siblings like mask_document (which actually modifies the file).
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies usage for non-destructive previewing but does not explicitly contrast with mask_document or other sibling tools. It provides clear context (file not modified, original values not returned) but no explicit when-to-use vs alternatives.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
unmask_documentC
Восстановить оригиналы в ранее замаскированном файле по сейфу.
| Name | Required | Description | Default |
|---|---|---|---|
| out | No | ||
| mode | No | ||
| path | Yes | ||
| vault_path | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden of behavioral disclosure. It only states the action ('restore originals') without revealing side effects, whether the operation is destructive, authentication requirements, or any rate limits. The description is insufficient for an agent to understand the tool's behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single sentence, but it is not concise because it is under-specified and in a non-English language, failing to efficiently convey necessary information. It does not earn its place as a useful guide.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
With 4 parameters (2 required), no output schema, and no annotations, the description is critically incomplete. It does not explain return values, prerequisites, parameter behavior, or any operational context. The agent cannot determine how to invoke the tool correctly.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 0%, and the description adds no meaning to any parameter. The parameter names (out, mode, path, vault_path) are not explained, and the enum mode (sequential/canonical) is left undefined. The description does not compensate for the lack of schema descriptions.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description states the tool restores originals in a previously masked file by vault, which is a specific verb+resource. However, it is in Russian, which may reduce clarity for non-Russian-speaking agents. It distinguishes from siblings like mask_document and unmask_text, but the phrase 'by vault' is ambiguous and does not fully align with the parameter name 'vault_path'.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance is provided on when to use this tool vs alternatives such as mask_document or unmask_text. There is no mention of prerequisites (e.g., the file must have been previously masked) or context for when unmasking is appropriate.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
unmask_textB
Вернуть оригиналы вместо тегов по сейфу. mode=canonical — для ответа модели (ФИО в именительном падеже), mode=sequential — точное восстановление ранее замаскированного текста.
| Name | Required | Description | Default |
|---|---|---|---|
| mode | No | ||
| text | Yes | ||
| vault_id | Yes | идентификатор из mask_text или путь к файлу сейфа |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden of behavioral disclosure. It mentions that the tool returns originals from a vault and describes two modes, but it does not disclose whether the operation is read-only, whether it modifies the vault, what happens on invalid vault_id or text, or any side effects. For a tool that likely interacts with a vault, this is a significant gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is concise: two sentences conveying purpose and mode details. The first sentence clearly states the action, and the second elaborates on modes. It is front-loaded and efficient, though it could be slightly more structured (e.g., separating mode descriptions) without losing brevity.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool has 3 parameters, no output schema, and no annotations, the description is incomplete. It explains modes but does not describe the return format, prerequisites (e.g., that text must have been previously masked), error conditions, or the behavior of the text parameter. The lack of output schema information means the agent has no idea what the tool returns. This is insufficient for safe and correct invocation.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is only 33% (only vault_id has a description). The description adds meaning for the mode parameter by explaining the two enum values, but it does not describe the text parameter at all. The vault_id parameter's schema description already covers its purpose. Overall, the description partially compensates for the low schema coverage by clarifying the mode parameter, but the text parameter remains undocumented.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool's purpose: 'Return originals instead of tags from the vault.' The two modes (canonical for model response, sequential for exact restoration) further specify what the tool does. The name and sibling tools (mask_text, unmask_document) help distinguish it as a text-level unmasking operation.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description explains when to use each mode (canonical for model response, sequential for exact restoration), but it does not explicitly state when to avoid this tool, nor does it compare it to alternatives like unmask_document or verify_text. The guidance is implicit through the mode descriptions, but lacks explicit exclusions or context for choosing between siblings.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
verify_textC
Проверить, что в тексте не осталось персональных данных. safe_to_send=false означает, что отправлять нельзя.
| Name | Required | Description | Default |
|---|---|---|---|
| text | Yes | ||
| allowlist | No | строки, которые маскировать не нужно | |
| mask_urls | No | скрывать ссылки | |
| tag_style | No | формат тега: #PERSON_1# | [[PERSON_1]] | <PERSON_1> | |
| extra_terms | No | дополнительные строки для маскирования | |
| mask_all_dates | No | скрывать все даты, не только даты рождения | |
| aggressive_names | No | скрывать одиночные слова, похожие на фамилии |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden of behavioral disclosure. It reveals that the tool returns a result where 'safe_to_send=false' means the text cannot be sent, but it omits many critical details: whether the tool has side effects, what the exact output structure is, authentication requirements, or rate limits. The description is too minimal for a tool with 7 parameters.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is two sentences, concise and front-loaded: first sentence states purpose, second explains a key output indicator. No redundant information. For a tool with a single core action, this is appropriately sized.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given 7 parameters and no output schema, the description is notably incomplete. It does not explain the return value format (e.g., boolean, object with 'safe_to_send'), how parameters like 'mask_urls' or 'tag_style' influence verification, or how this tool relates to the sibling 'scan_document' (both seem to check PII). An agent would lack essential context to use it correctly.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 86% (6 of 7 parameters have descriptions), so baseline is 3. The tool description does not add any commentary on parameters beyond what the schema already provides. For example, it doesn't explain how 'allowlist' or 'aggressive_names' affect the verification logic. The description thus provides no additional value for parameter understanding.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description states the verb 'Проверить' (check) and resource 'текст' (text), clearly indicating it verifies absence of personal data. It also hints at the output semantics with 'safe_to_send=false'. This differentiates it from siblings like mask_text (which modifies) and scan_document (which likely processes documents). However, it does not explicitly specify the return type (e.g., boolean or object), slightly reducing clarity.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides no guidance on when to use this tool versus alternatives like mask_text or scan_document. There is no mention of prerequisites, typical workflows (e.g., 'call after masking'), or exclusions. The sibling tools suggest different operations, but the description does not help an agent decide.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Tool Schema Changelog
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
6 tool updates
v1.0.0- First observed
mask_document - First observed
mask_text - First observed
scan_document - First observed
unmask_document - First observed
unmask_text - First observed
verify_text
TDQS
Scored across 6 tools
Each tool targets a distinct operation (mask vs unmask, text vs file) and the descriptions clearly differentiate text vs document variants. No two tools could be confused for the same purpose.
All tool names follow a consistent verb_noun pattern using snake_case: mask_text, unmask_text, verify_text, scan_document, mask_document, unmask_document. The verbs are predictable and the nouns clearly indicate the resource type.
With exactly 6 tools, the server is well-scoped for the domain of personal data masking/unmasking. Each tool serves a necessary role without redundancy, covering both text and document workflows in a focused manner.
The tool surface covers the full lifecycle: mask (text+document), unmask (text+document), verification, and preview. There are no obvious gaps—the server provides everything needed to protect and restore personal data in both free text and structured documents.
Maintenance
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MCP server for detecting and redacting PII (Personally Identifiable Information) in PDF documents.
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MCP-Native LLM Orchestration Agent
Authenticated LLM MCP Agent
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