从文档文件中提取文字内容，支持 PDF、Word、TXT、MD 等格式
AI agents call extract_text_from_file to retrieve information from Word Cloud MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs text extraction—a read-only operation that retrieves data from files with no side effects, no code execution, no data modification, and no irreversible actions. It fits the Read category definition: 'retrieves or queries data; no side effects'. The low severity reflects minimal risk if misused by an AI agent, as it only extracts existing information without capability to modify systems or data.
From the tool's definition Tool description states "从文档文件中提取文字内容" (extract text content from document files). The operation retrieves and queries text data from various formats (PDF, Word, TXT, MD) without modifying, deleting, or executing anything.
Attacks that exploit this kind of access
从文档文件中提取文字内容，支持 PDF、Word、TXT、MD 等格式. It is categorised as a Read tool in the Word Cloud MCP MCP Server, which means it retrieves data without modifying state.
Register the Word Cloud MCP server in PolicyLayer and add a rule for extract_text_from_file: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Word Cloud MCP. Nothing to install.
extract_text_from_file is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the extract_text_from_file rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for extract_text_from_file. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
extract_text_from_file is provided by the Word Cloud MCP server (onepiecelwc/word-cloud-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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