securedact-mcp
SecuRedact MCP
SecuRedact 是面向 AI 代理和 AI 工作流的本地优先隐私与安全层。它能在数据到达模型、工具、文件或外部目标之前,检测并保护敏感数据——个人数据 / PII、GDPR 敏感信息、凭据、API 密钥、令牌、机密和敏感文件。
SecuRedact MCP 是 Apache-2.0 开源 MCP 服务器和可复用的 Python 隐私引擎。它检测敏感文本,应用版本化策略,在本地进行脱敏,并在将净化内容标记为已批准之前验证残余输出。
MCP 模式不会自动拦截每个提示。宿主必须调用该工具,并且仅在
status == "ok"时发送sanitized_text;配置错误或恶意的 MCP 宿主可以绕过这种普通的 MCP 工作流。提供商原生的强制钩子是单独的集成资产:当受支持的提供商在其提示生命周期边界调用此类钩子时,它可以在正常模型处理之前应用相同的确定性决策。参见 SecuRedact Enforced。
为什么选择 SecuRedact
AI 代理越来越多地读取文件、调用工具并向外部模型发送提示。除非先检查数据,否则这会暴露 PII、凭据和敏感文档。SecuRedact 是 AI 工作流的隐私和安全控制:
本地优先 — 所有检测、脱敏和策略评估都在您的机器上运行。默认无网络监听、无遥测、无提供商调用。
PII / GDPR 检测 — 姓名、电子邮件、IBAN、标识符和特殊类别数据均被检测并伪匿名化或脱敏。
机密与凭据保护 — API 密钥、令牌和密码均被检测并阻止离开您的环境。
文件系统保护 — 读取操作可防御路径遍历/符号链接逃逸,并阻止访问受保护路径(如
.env)。AI 代理隐私防火墙 — 针对 Claude Code 和 Gemini CLI 的强制钩子在提示、模型调用或工具操作继续之前运行相同的本地决策。
网络 / 出口感知 — 出站工具调用被分类(内部/外部/未知),以便策略可以要求批准或阻止出口。
SecuRedact 有助于减少敏感数据的暴露;它不保证合规性,也不声称能防止每一次泄露。参见 限制。
Related MCP server: phi-redact-mcp
快速开始
从 PyPI 安装并运行引导式设置(Windows):
py -3.12 -m pip install "securedact-mcp[ml]"
securedact-mcp setupLinux / macOS:
python3.12 -m pip install "securedact-mcp[ml]"
securedact-mcp setup在几秒钟内保护一段文本(仅确定性演示,无需模型):
import os
os.environ["SECUREDACT_REQUIRE_FLAIR"] = "0" # deterministic detectors only
from securedact_core import RedactionRequest, SecuredactEngine
engine = SecuredactEngine.from_environment()
result = engine.prepare(
RedactionRequest(
text="Contact alex@example.test, IBAN NL91ABNA0417164300",
policy="strict_external_ai",
)
)
print(result.status) # "ok"
print(result.sanitized_text) # "Contact [EMAIL_1], IBAN [IBAN_1]"可复现的合成安全演示:docs/distribution/security-demo.md。
安全默认工作流
对于正常的外部 AI 准备,使用 prepare_for_external_ai:
{
"text": "Contact alex@example.test",
"policy": "strict_external_ai",
"language": "auto",
"response_mode": "minimal"
}已批准的响应:
{
"schema_version": "1",
"status": "ok",
"sanitized_text": "Contact [EMAIL_1]",
"counts": {"email": 1},
"policy": "strict_external_ai",
"policy_version": 1,
"policy_digest": "...",
"reason_codes": []
}review_required 和 blocked 响应绝不包含已批准的 sanitized_text。最小响应不包含原始文本、原始实体值、映射、异常体、堆栈跟踪、模型路径或恢复句柄,除非显式选择了 restore_capable。
架构与信任边界
flowchart LR
H["MCP host"] --> M["Securedact MCP"]
M --> D["deterministic detectors"]
M --> C["contextual detectors"]
D --> P["policy engine"]
C --> P
P --> R["redactor"]
R --> V["residual validator"]
V --> O["approved sanitized output"]
O --> W["host-controlled downstream workflow"]
H -. "host may bypass MCP" .-> W服务器没有提供商客户端、OpenAI 兼容代理、反向代理、网站、桌面聊天机器人、提供商凭据或提供商特定的转发。参见 ADR 0001 和 威胁模型。
工具
工具 | 预期用途 | 敏感响应行为 |
| 推荐的完整安全工作流 | 默认最小化 |
| 较低级别的本地分析/审查 | 最小化; |
| 较低级别的兼容性操作 | 默认最小化;显式 |
| 使用本地不透明会话 | 默认单次使用;直接映射需要显式受信任的旧模式 |
| 在一个配置的根目录下写入已批准的 | 不返回映射或绝对路径 |
| 安全读取本地文件并仅返回净化文本 | 在读取前阻止受保护路径;拒绝路径遍历/符号链接/二进制;默认 |
响应模式为 minimal、review、debug 和 restore_capable。除非进程以 SECUREDACT_ENABLE_DEBUG_RESPONSES=1 启动,否则调试被禁用;MCP 请求无法启用它。内存中的恢复会话使用加密随机句柄、有界容量、过期时间、并发保护和单次使用消费。进程退出会销毁所有会话。
安装
支持 Python >=3.12,<3.13。
对于从 PyPI 的正常安装:
py -3.12 -m pip install "securedact-mcp[ml]"
securedact-mcp setup在 Linux 或 macOS 上,使用 python3.12 -m pip install "securedact-mcp[ml]";当 python 已经选择受支持的 3.12 环境时,python -m pip install "securedact-mcp[ml]" 也是合适的。
setup 检查包、Python 和 ML 依赖,检查本地模型状态,提供现有的基于同意的模型安装程序,运行现有的离线验证器,并在检测到这些宿主时提供打包的 Claude Code 和 Gemini CLI 集成。它使用提供商的官方插件/扩展命令,并且可以安全地重新运行。它不会调用提供商模型 API、自动接受提供商信任,也不会下载上下文模型,除非用户显式选择模型设置并接受现有的上游提示。
手动模型命令仍可用于高级或无人值守操作:
securedact-mcp install
securedact-mcp models verify
securedact-mcp最后一个命令启动本地 stdio 服务器。标准输出保留用于 MCP 协议消息。securedact-mcp setup --non-interactive 报告状态,而不暗示上游接受或配置新提供商。使用 --host claude、--host gemini 或 --host all 进行有针对性的交互式提供商设置。
开发者/源码安装
要从已审查的源码检出工作,请改为:
git clone https://github.com/GigantesHJI/securedact-mcp.git
cd securedact-mcp
python -m pip install ".[ml]"
securedact-mcp setup仓库或 wheel 中不包含模型检查点,启动时也从不下载。Securedact 不重新分发这些模型权重。上游模型权重保留其自己的许可证,并且不会由 Apache-2.0 重新许可。参见 模型安装 和 第三方许可证。
必须显式选择仅确定性的本地开发:
$env:SECUREDACT_REQUIRE_FLAIR = "0"
securedact-mcp生产环境默认要求上下文能力,并在配置的模型缺失、加载中、损坏或不可用时以失败关闭。
宿主包
integrations/ 下提供了针对 Codex、Cursor 和 Windsurf 的测试配置资产和安全工作流说明。自动化 MCP 客户端测试工具验证服务器启动、工具列表、调用、最小响应形状、stdout 完整性和关闭。它不证明真实宿主会为每个提示调用该工具。参见 兼容性证据。
该仓库也是 Gemini CLI 扩展根:gemini extensions install https://github.com/GigantesHJI/securedact-mcp 可以安装钩子。该路径需要 gemini-cli-extension 主题和包含根清单的发布标签树;如果没有 pip install "securedact-mcp[ml]" 和本地模型,安装的钩子不会强制执行任何内容。参见 SecuRedact Enforced。
策略和 Python API
内置策略包括 default、strict_external_ai、gdpr、identifiers_only 和 review_all_contextual;兼容性策略仍然可用。本地组织策略文件仅从受控策略目录加载,使用严格的声明式模式,并且不能禁用失败关闭不变量。未知、重复、过大、格式错误或符号链接的策略会失败关闭。
from securedact_core import RedactionRequest, SecuredactEngine
engine = SecuredactEngine.from_environment()
result = engine.prepare(
RedactionRequest(
text="Contact alex@example.test",
policy="strict_external_ai",
)
)from_environment() 保留上下文模型要求。独立的确定性开发需要 SECUREDACT_REQUIRE_FLAIR=0;应用程序也可以注入经过测试的检测器实现。参见 公共 API 和 策略。
可复现开发
已提交的 uv.lock 为 Python 3.12 解析运行时、ML、开发、基准测试和安全扩展。
uv sync --frozen --extra dev --extra benchmark
uv run python scripts\verify.py切勿在测试、问题、截图、夹具或拉取请求中使用真实的个人信息、私人文档、凭据、客户日志或模型权重。参见 CONTRIBUTING.md。
评估与性能
uv run python -m securedact_eval quality --mode deterministic --gate `
--thresholds benchmarks\thresholds.json `
--baseline benchmarks\baselines\quality-deterministic.json
uv run python -m securedact_eval performance --mode deterministic版本化合成语料库报告精确和宽松的跨度精确率、召回率、F1、假阳性和假阴性率、按实体/语言/领域/拆分的结果、动作/类别准确率以及引导召回区间。真阴性是文档级别的负例,而不是令牌级别的安全性。GDPR 相关套件是检测评估,不是法律合规认证。真实的 Flair 和 GPU 基准测试需要显式配置的本地模型,并且不是普通的 CI。参见 基准测试。 基准测试框架 记录了本地数据层级和大型配置文件;迁移计划 定义了其未来的提取边界。对于在 GitHub 执行仓库步骤之前发生的失败,请使用 CI 故障排除决策树。本地成功不能替代必需的 GitHub 检查。
安全与限制
应用程序代码不会记录任何提示、发现、映射、恢复句柄、机密、模型输入或恢复输出。
确定性和上下文检测可能会遗漏新颖、模糊或对抗性的披露;不声称具有共指和通用混淆抵抗能力。
审查偏移量允许拥有原始输入的受信任本地客户端重建值;请将审查响应保留在本地。
宿主行为和下游提供商行为不在信任边界内。
文件中记录的仓库安全设置仍需要管理员验证。
使用 SECURITY.md 私下报告漏洞。请勿在公共问题中放置漏洞详细信息或真实数据。
许可证
原始仓库源码和文档根据 Apache License 2.0 许可。版权归属记录在 NOTICE 中。第三方依赖和模型权重保留其自己的许可证。
Available Tools
6 toolsanalyze_textA
Inspect text locally and report detected sensitive content without producing sanitized output.
Use this when you need to understand what PII, secrets, or credentials are present (counts, entity types, and, with review/debug modes, positions) but do not need redacted text for transmission. The original text is not modified and no sanitized representation is returned. For a policy-approved, ready-to-send result use prepare_for_external_ai; for a sanitized file use create_safe_copy; for reversing a prior local session use restore_text.
Returns a JSON object with 'status' ('ok', 'review_required', or 'blocked'), 'policy', 'policy_version', 'policy_digest', 'counts' (entity-type tallies), and, when response_mode is 'review' or 'debug', a 'findings' list. 'debug' additionally returns 'debug_details'.
| Name | Required | Description | Default |
|---|---|---|---|
| text | Yes | Free text to inspect locally for sensitive content. Processing is on this machine only; the original text is never modified or transmitted. | |
| policy | No | Named analysis policy controlling which detectors and entity types apply. Defaults to 'default'. Common values include 'default'; other policies may be registered in your environment. An unknown name returns a policy_not_found error. | default |
| response_mode | No | Level of detail returned. 'minimal' returns only status and entity-type counts; 'review' additionally returns a 'findings' list with spans and entity types; 'debug' additionally returns 'debug_details' (only when debug responses are enabled). Defaults to 'minimal'. | minimal |
Output Schema
| Name | Required | Description |
|---|---|---|
No output parameters | ||
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It states the text is processed locally, never modified, and no sanitized representation is returned. It also discloses conditions like 'debug responses are enabled' and the policy_not_found error, giving a complete picture of side effects and edge 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 dense but well-organized: a one-line purpose statement, then usage guidance, alternatives, and return format all in a compact sequence. Every sentence adds value; there is no fluff or repetition, and the critical scoping constraint ('without producing sanitized output') is front-loaded.
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 tool has 3 parameters, all fully documented in the schema, and an output schema (implied via the described JSON structure). The description explains the return object thoroughly, including conditional fields for review/debug modes, and covers error behavior for unknown policies. Nothing an agent needs to invoke it correctly is missing.
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?
All three parameters already have descriptive schema entries (coverage 100%), so the baseline is 3. The description adds meaningful context beyond the schema: it explains the effect of response_mode on the return structure, describes the policy error condition, and reiterates local-only processing for the text parameter. This extra context justifies a 4 rather than a baseline 3.
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 opens with a specific verb-resource pair ('Inspect text locally') and explicitly distinguishes the tool by stating it reports sensitive content 'without producing sanitized output.' This clearly differentiates it from siblings like prepare_for_external_ai and create_safe_copy, making its purpose immediately unambiguous.
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 gives explicit when-to-use guidance: 'Use this when you need to understand what PII, secrets, or credentials are present... but do not need redacted text for transmission.' It then names three alternatives with their appropriate contexts (prepare_for_external_ai, create_safe_copy, restore_text), leaving no ambiguity about tool selection.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
create_safe_copyA
Sanitize text locally and write the approved result to a new file in the Safe Copies directory.
Use this when you need a sanitized on-disk copy (for storage, handoff, or archival) rather than an in-memory sanitized string. For the sanitized text only, use prepare_for_external_ai; for inspection-only use analyze_text; for reversing a prior session use restore_text.
Side effects: a new file is written to the directory set by SECUREDACT_SAFE_COPY_DIR. The supplied 'content' is not modified and no existing file is overwritten. The filename must be a bare '.txt' or '.md' basename (no path separators or directory traversal). The operation blocks and reports 'blocked' if the directory is unconfigured, the filename is invalid, or policy blocks the content.
Returns a JSON object with 'status' ('ok' or 'blocked'), 'filename', and 'counts'.
| Name | Required | Description | Default |
|---|---|---|---|
| policy | No | Named redaction policy applied before writing. Defaults to 'strict_external_ai'. An unknown name returns a policy_not_found error. | strict_external_ai |
| content | Yes | Text to sanitize locally and write to disk. Processed on this machine; never transmitted. | |
| filename | Yes | Bare target filename (no directory components) ending in '.txt' or '.md'. The file is created inside the configured Safe Copies directory; an existing file is never overwritten. |
Output Schema
| Name | Required | Description |
|---|---|---|
No output parameters | ||
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are present, so the description carries the full burden—and it excels. It discloses side effects: writes a new file to SECUREDACT_SAFE_COPY_DIR, does not modify 'content', never overwrites an existing file, blocks with status 'blocked' under specific conditions, and returns a JSON structure. This is a thorough disclosure of behavior beyond the schema.
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 well-structured: core action first, then usage guidance, then side effects, then return format. Each paragraph adds distinct value with no redundancy. Concise yet complete, and front-loaded with the most important decision-driving information.
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's moderate complexity (3 parameters, no nested objects), an output schema exists (per signals), and the description itself explains side effects, blocking conditions, filename constraints, and return format. Nothing an agent needs to call it correctly is missing. The description is fully self-contained even without annotations.
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 100%, so the schema fully describes all three parameters. The description adds practical context (e.g., filename must be bare, policy defaults to 'strict_external_ai', content is never transmitted) but does not materially enhance the semantic meaning beyond what the schema already provides. 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?
States a specific action ('sanitize text locally and write the approved result to a new file'), names the resource ('Safe Copies directory'), and explicitly differentiates from all four siblings by naming them and the conditions under which each is preferred. An agent can immediately tell this tool writes a sanitized copy to disk.
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 second paragraph gives explicit when-to-use guidance: 'Use this when you need a sanitized on-disk copy... rather than an in-memory sanitized string,' and names the alternative tools (prepare_for_external_ai, analyze_text, restore_text) with their complementary use cases. This fully eliminates ambiguity about tool selection.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
prepare_for_external_aiA
Use this before sending user-supplied or potentially sensitive text to an external AI service.
SecuRedact inspects and sanitizes the text locally and returns the policy-approved representation; this tool does not transmit the text externally. It is the recommended default for outbound AI workflows. Use analyze_text for inspection-only classifications, redact_text for the lower-level compatibility path, create_safe_copy when a sanitized file is required, and restore_text only to reverse a prior local session in a trusted context.
Returns a JSON object with 'status' ('ok', 'review_required', or 'blocked'), 'sanitized_text' (present only when approved), 'counts', 'policy', and optionally 'restoration_session' (when response_mode is 'restore_capable').
| Name | Required | Description | Default |
|---|---|---|---|
| text | Yes | Free text to inspect and sanitize locally before it is sent to an external AI service. All processing happens on this machine; this tool never transmits the text to any provider. | |
| policy | No | Named redaction policy controlling which entity types are masked or blocked. Defaults to 'strict_external_ai'. Common values include 'strict_external_ai' and 'default'; other policies may be registered in your environment. An unknown name returns a policy_not_found error. | strict_external_ai |
| language | No | Hint for the contextual detection language. One of 'auto' (detect automatically), 'en', or 'nl'. Defaults to 'auto'. | auto |
| response_mode | No | Amount of detail returned. 'minimal' returns only the approved result and counts; 'review' adds per-detection findings for human review; 'debug' adds engine internals (only when debug responses are enabled); 'restore_capable' additionally returns a local restoration_session for later trusted restore_text. Defaults to 'minimal'. | minimal |
Output Schema
| Name | Required | Description |
|---|---|---|
No output parameters | ||
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full transparency burden and does well by stating that the tool does not transmit text externally, operates locally, can return different statuses, and optionally creates a restoration session. It also discloses the policy_not_found error behavior. It could go slightly further on whether any local state or session data is persisted, but overall it is transparent for a sanitization tool.
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 front-loaded with the primary use case, then a clear sibling-routing paragraph, then a concise output contract. Every sentence earns its place, and the structure makes it easy for an agent to scan quickly.
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 covers when to use the tool, how it behaves, what alternatives exist, and what the return value looks like including statuses and optional fields. With a rich input schema and output schema present, nothing essential is missing for an agent to select and invoke 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 100%, and the input schema already explains text, policy, language, and response_mode in detail. The description adds little new parameter-level meaning beyond the schema, but the schema is fully sufficient, so the baseline score of 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 states a specific use case: preparing user-supplied or sensitive text before sending it to an external AI service, with local sanitization via SecuRedact. It clearly differentiates from siblings by naming each alternative and its purpose (analyze_text, redact_text, create_safe_copy, restore_text).
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?
It explicitly recommends this tool as the default for outbound AI workflows and gives concrete routing rules: analyze_text for inspection-only, redact_text for lower-level compatibility, create_safe_copy when a file is needed, and restore_text only for reversing a prior local session. This leaves little ambiguity about when to choose it.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
redact_textA
Direct/lower-level redaction entry point; prefer prepare_for_external_ai for normal outbound workflows.
In its normal modes this performs the same local sanitization as prepare_for_external_ai and returns the approved result, so most agents should call prepare_for_external_ai instead. Use redact_text when you specifically need this lower-level compatibility path, or the 'legacy' mode for local review of raw redaction internals. The 'legacy' mode returns potentially sensitive local-review details and is never selected by default.
Returns, for normal modes, the same approved result as prepare_for_external_ai (status, sanitized_text, counts). For 'legacy' mode it returns a result with deprecation_code 'legacy_sensitive_response' containing local-review redaction data.
| Name | Required | Description | Default |
|---|---|---|---|
| text | Yes | Free text to redact locally. Processing is on this machine; nothing is transmitted externally. | |
| policy | No | Named redaction policy controlling which entity types are masked or blocked. Defaults to 'default'. Common values include 'default' and 'strict_external_ai'; other policies may be registered. An unknown name returns a policy_not_found error. | default |
| response_mode | No | Normal modes behave like prepare_for_external_ai: 'minimal', 'review', and 'debug' return the approved result with increasing detail. The special value 'legacy' returns raw local-review redaction internals (including a mapping that reveals original values) under deprecation_code 'legacy_sensitive_response'; it must never be sent to an external service. Defaults to 'minimal'. | minimal |
Output Schema
| Name | Required | Description |
|---|---|---|
No output parameters | ||
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 transparently warns that legacy mode 'returns potentially sensitive local-review details' and 'must never be sent to an external service', and specifies the return contents (status, sanitized_text, counts) for normal modes. It also notes local processing, adding essential context about data handling.
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 concisely structured: the first sentence directly states the routing preference, followed by a clear explanation of normal vs. legacy behavior, and finally the return contract. Every sentence earns its place, with no filler or repetition.
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's three parameters and existing output schema, the description covers all necessary context: when to use it, what it returns, the special legacy mode with its sensitive nature, and the difference from its sibling. No critical information is missing for 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 coverage is 100%, so the baseline is 3. The description adds meaningful value for response_mode by clarifying that normal modes 'behave like prepare_for_external_ai' and that the legacy value exposes original values, which is not fully captured in the schema. This extra explanation helps an agent avoid misusing the sensitive legacy path.
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 identifies this as a 'Direct/lower-level redaction entry point' and explicitly states it performs 'the same local sanitization as prepare_for_external_ai', distinguishing it from the preferred sibling. It names the action (redact), the resource (text), and explains the optional legacy mode, leaving no ambiguity about what the tool does.
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 gives explicit guidance: 'prefer prepare_for_external_ai for normal outbound workflows' and 'Use redact_text when you specifically need this lower-level compatibility path, or the legacy mode'. It names the alternative tool and the precise conditions for choosing this one, fully satisfying the when/when-not requirement.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
restore_textA
Reverse a prior SecuRedact protection step in a trusted, local-only context.
Use this ONLY after you previously received a restoration_session from SecuRedact (for example from prepare_for_external_ai with response_mode 'restore_capable') and now need to reconstruct the original text locally for trusted review. Restoration can reveal the original sensitive values (PII, secrets, credentials); it is a trusted-local operation, not a step to prepare data for external transmission. Never call it to sanitize or prepare text for an external AI; for that use prepare_for_external_ai. Never call it on text you did not previously protect with SecuRedact.
Security boundary: all processing is local and nothing leaves the machine. The 'mapping' form requires trusted_local_review=true and exposes raw originals, so its output must never be transmitted. Returns a JSON object with 'status' ('ok' or 'blocked'), 'restored_text' (present only on success), and 'reason_codes' describing any failure.
| Name | Required | Description | Default |
|---|---|---|---|
| text | Yes | Text containing SecuRedact placeholders (or a prior protected representation) to restore. Processed locally; never transmitted. | |
| mapping | No | Legacy direct mapping from placeholder token to original value. Supplying this bypasses the session vault and immediately reveals the original sensitive values. It is only honored when 'trusted_local_review' is true and 'restoration_session' is omitted. | |
| restoration_session | No | Opaque session token previously returned by SecuRedact (for example from prepare_for_external_ai with response_mode 'restore_capable'). It identifies the trusted local vault entry used to reverse protection and recover the original values. Required unless you supply 'mapping' together with trusted_local_review. | |
| trusted_local_review | No | Explicit acknowledgment that you are in a trusted local review context and accept that restoration reveals original sensitive values. Required (true) to use the 'mapping' form. It has no effect on the 'restoration_session' form. |
Output Schema
| Name | Required | Description |
|---|---|---|
No output parameters | ||
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description takes full responsibility for behavioral disclosure. It reveals that processing is entirely local and nothing leaves the machine, that the mapping form requires trusted_local_review=true and exposes raw originals that must never be transmitted, and it details the return format including 'status', 'restored_text', and 'reason_codes' for failures. This goes well beyond the schema and covers security-boundary concerns comprehensively.
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 structured with a clear lead sentence stating the core action, followed by usage conditions and security boundary in a logical flow. Every sentence contributes new information—no redundancy or fluff—and the critical constraints (local-only, trusted-review) are front-loaded. The length is justified by the security-sensitive nature of the operation.
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?
For a security-sensitive restoration tool with no annotations and no explicit output schema details (though an output schema exists), the description is remarkably complete. It covers preconditions, security boundaries, parameter interactions, failure handling via reason_codes, and explicitly routes to the correct sibling for sanitization. Nothing an agent needs to call it correctly and safely is missing.
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 100%, so the baseline is 3. However, the description enriches the parameters: it explains the mapping parameter as 'legacy direct mapping' that bypasses the session vault and immediately reveals originals, describes restoration_session as an opaque token identifying the trusted vault entry, and clarifies that trusted_local_review is an acknowledgment with no effect on the session form. These security-relevant semantics add value beyond the schema.
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 'Reverse' and identifies the resource as 'a prior SecuRedact protection step', clearly stating the local trusted-review purpose. It explicitly distinguishes itself from sibling tools by warning against using it for external AI preparation and pointing to prepare_for_external_ai for that role, so it is immediately differentiated.
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 gives explicit preconditions: use only after receiving a restoration_session from SecuRedact (e.g., from prepare_for_external_ai with response_mode 'restore_capable'), and never on text not previously protected. It also names the alternative tool and states the exact negative condition ('never call it to sanitize or prepare text for an external AI'), leaving no ambiguity about when to choose this tool.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
securedact_read_fileA
Safely read a local file and return only its sanitized (PII/secrets removed) text.
Use this when you must ingest a local file's contents for use with an external AI but want path-traversal, size, and binary defenses plus sanitization applied first. If the content is already in memory, use prepare_for_external_ai; for a sanitized file on disk, use create_safe_copy.
Side effects: reads a file from local disk and never transmits it. Sensitive paths and escapes are blocked before any file content is read. The returned 'sanitized_text' is safe to forward.
Returns a JSON object with 'status' ('ok' or 'blocked'), 'path', and 'sanitized_text' (present only when approved).
| Name | Required | Description | Default |
|---|---|---|---|
| path | Yes | Local filesystem path to read. It is resolved and defended against path traversal, symlink/UNC escapes, and oversized or binary content (FW-011/012/013); sensitive paths are blocked before any file content is read. | |
| policy | No | Named redaction policy applied to the file contents. Defaults to 'strict_external_ai'. An unknown name returns a policy_not_found error. | strict_external_ai |
| max_bytes | No | Optional cap on the number of bytes read from the file. When omitted, the engine's configured size limit applies. |
Output Schema
| Name | Required | Description |
|---|---|---|
No output parameters | ||
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description fully owns behavioral disclosure. It spells out side effects (reads file, never transmits), the defense order (sensitive paths and escapes blocked before reading), and the return structure. It even notes sanitized_text is safe to forward. This is thorough and anticipates an agent's security and safety questions.
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 well-structured: purpose sentence, usage trigger, alternatives, side-effects, and return format. Every sentence serves a distinct function with no redundancy. The most important info (what it does and when to use it) is front-loaded.
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 output schema is present, all return fields are covered. The description addresses security, policy defaults, size limits, and side effects. There is nothing an agent needs to know to call this tool correctly that is missing or ambiguous.
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 100%, so the schema already documents all three parameters. The tool description itself does not add new meaning beyond what's in the schema, but it does echo the security posture (e.g., path defenses). Baseline 3 is appropriate because the schema carries the load and the description adds no extra helpful nuance.
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 opens with a specific verb and resource: 'Safely read a local file and return only its sanitized text.' It clearly distinguishes from siblings by naming prepare_for_external_ai (in-memory content) and create_safe_copy (sanitized file on disk), so the agent can immediately tell which tool to use.
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?
It explicitly states the condition for use: 'when you must ingest a local file's contents for use with an external AI' and gives two alternatives with the contexts under which those would be preferred. This is direct routing guidance.
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
v0.4.2- Changed
analyze_text3 fields changed- added
Input schema / properties / policy / descriptionAdded value: +"Named analysis policy controlling which detectors and entity types apply. Defaults to 'default'. Common values include 'default'; other policies may be registered in your environment. An unknown name returns a policy_not_found error." - added
Input schema / properties / response_mode / descriptionAdded value: +"Level of detail returned. 'minimal' returns only status and entity-type counts; 'review' additionally returns a 'findings' list with spans and entity types; 'debug' additionally returns 'debug_details' (only when debug responses are enabled). Defaults to 'minimal'." - added
Input schema / properties / text / descriptionAdded value: +"Free text to inspect locally for sensitive content. Processing is on this machine only; the original text is never modified or transmitted."
- Changed
create_safe_copy3 fields changed- added
Input schema / properties / content / descriptionAdded value: +"Text to sanitize locally and write to disk. Processed on this machine; never transmitted." - added
Input schema / properties / filename / descriptionAdded value: +"Bare target filename (no directory components) ending in '.txt' or '.md'. The file is created inside the configured Safe Copies directory; an existing file is never overwritten." - added
Input schema / properties / policy / descriptionAdded value: +"Named redaction policy applied before writing. Defaults to 'strict_external_ai'. An unknown name returns a policy_not_found error."
- Changed
prepare_for_external_ai4 fields changed- added
Input schema / properties / language / descriptionAdded value: +"Hint for the contextual detection language. One of 'auto' (detect automatically), 'en', or 'nl'. Defaults to 'auto'." - added
Input schema / properties / policy / descriptionAdded value: +"Named redaction policy controlling which entity types are masked or blocked. Defaults to 'strict_external_ai'. Common values include 'strict_external_ai' and 'default'; other policies may be registered in your environment. An unknown name returns a policy_not_found error." - added
Input schema / properties / response_mode / descriptionAdded value: +"Amount of detail returned. 'minimal' returns only the approved result and counts; 'review' adds per-detection findings for human review; 'debug' adds engine internals (only when debug responses are enabled); 'restore_capable' additionally returns a local restoration_session for later trusted restore_text. Defaults to 'minimal'." - added
Input schema / properties / text / descriptionAdded value: +"Free text to inspect and sanitize locally before it is sent to an external AI service. All processing happens on this machine; this tool never transmits the text to any provider."
- Changed
redact_text3 fields changed- added
Input schema / properties / policy / descriptionAdded value: +"Named redaction policy controlling which entity types are masked or blocked. Defaults to 'default'. Common values include 'default' and 'strict_external_ai'; other policies may be registered. An unknown name returns a policy_not_found error." - added
Input schema / properties / response_mode / descriptionAdded value: +"Normal modes behave like prepare_for_external_ai: 'minimal', 'review', and 'debug' return the approved result with increasing detail. The special value 'legacy' returns raw local-review redaction internals (including a mapping that reveals original values) under deprecation_code 'legacy_sensitive_response'; it must never be sent to an external service. Defaults to 'minimal'." - added
Input schema / properties / text / descriptionAdded value: +"Free text to redact locally. Processing is on this machine; nothing is transmitted externally."
- Changed
restore_text4 fields changed- added
Input schema / properties / mapping / descriptionAdded value: +"Legacy direct mapping from placeholder token to original value. Supplying this bypasses the session vault and immediately reveals the original sensitive values. It is only honored when 'trusted_local_review' is true and 'restoration_session' is omitted." - added
Input schema / properties / restoration_session / descriptionAdded value: +"Opaque session token previously returned by SecuRedact (for example from prepare_for_external_ai with response_mode 'restore_capable'). It identifies the trusted local vault entry used to reverse protection and recover the original values. Required unless you supply 'mapping' together with trusted_local_review." - added
Input schema / properties / text / descriptionAdded value: +"Text containing SecuRedact placeholders (or a prior protected representation) to restore. Processed locally; never transmitted." - added
Input schema / properties / trusted_local_review / descriptionAdded value: +"Explicit acknowledgment that you are in a trusted local review context and accept that restoration reveals original sensitive values. Required (true) to use the 'mapping' form. It has no effect on the 'restoration_session' form."
- Added
securedact_read_file
5 tool updates
v0.2.0- Changed
analyze_text1 field changed- added
Input schema / properties / response_modeAdded value: +{ + "default": "minimal", + "title": "Response Mode", + "type": "string" +}
- Changed
create_safe_copy1 field changed- changed
Input schema / properties / policy / defaultPrevious value: -"default"New value: +"strict_external_ai"
- Added
prepare_for_external_ai - Changed
redact_text1 field changed- added
Input schema / properties / response_modeAdded value: +{ + "default": "minimal", + "title": "Response Mode", + "type": "string" +}
- Changed
restore_text11 fields changed- removed
Input schema / properties / mapping / additionalPropertiesRemoved value: -{ - "type": "string" -} - added
Input schema / properties / mapping / anyOfAdded value: +[ + { + "additionalProperties": { + "type": "string" + }, + "type": "object" + }, + { + "type": "null" + } +] - added
Input schema / properties / mapping / defaultAdded value: +null - removed
Input schema / properties / mapping / typeRemoved value: -"object" - added
Input schema / properties / restoration_sessionAdded value: +{ + "anyOf": [ + { + "type": "string" + }, + { + "type": "null" + } + ], + "default": null, + "title": "Restoration Session" +} - added
Input schema / properties / trusted_local_reviewAdded value: +{ + "default": false, + "title": "Trusted Local Review", + "type": "boolean" +} - changed
Input schema / requiredPrevious value: -[ - "text", - "mapping" -]New value: +[ + "text" +] - added
Output schema / additionalPropertiesAdded value: +true - removed
Output schema / propertiesRemoved value: -{ - "result": { - "title": "Result", - "type": "string" - } -} - removed
Output schema / requiredRemoved value: -[ - "result" -] - changed
Output schema / titlePrevious value: -"restore_textOutput"New value: +"restore_textDictOutput"
4 tool updates
v0.1.0- First observed
analyze_text - First observed
create_safe_copy - First observed
redact_text - First observed
restore_text
TDQS
Scored across 6 tools
Most tools have clearly distinct purposes (analyze, restore, create, read file), but redact_text is explicitly described as a lower-level compatibility path that performs the same sanitization as prepare_for_external_ai, which could cause misselection if an agent reads only the names. The detailed descriptions mitigate this ambiguity, keeping it to just one confusing pair.
All tool names use snake_case and mostly follow a verb_noun pattern (analyze_text, redact_text, restore_text, create_safe_copy). prepare_for_external_ai and securedact_read_file deviate slightly—one uses a longer phrase and the other has a product-name prefix—but the overall style remains predictable and readable.
With 6 tools, the server is well-scoped for its purpose of text sanitization and file handling. Each tool covers a distinct workflow step (inspect, sanitize, restore, file read/write), and the count is within the ideal 3-15 range without being bloated or sparse.
The tool surface covers the full lifecycle of sensitive text handling: sanitizing for external AI, inspection-only analysis, lower-level redaction, restoration, creating safe copies, and reading files safely. No obvious dead ends or missing operations for the stated domain; the additional file-oriented tools fill a practical gap.
Maintenance
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