AI agents call fetch_page_text to retrieve information from Web Fetch without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a straightforward data retrieval tool that fetches and parses the textual content of a web page. It has no side effects, does not modify or delete data, and does not execute arbitrary code. The capability to render dynamic content via Puppeteer does not change the classification—it still only retrieves and returns information.
From the tool's definition Tool extracts and returns page text content (removes HTML tags) for reading or analyzing page text information. No modification, deletion, or code execution capabilities described. Returns data only.
Attacks that exploit this kind of access
提取网页的主要文本内容（去除 HTML 标签），用于阅读或分析页面文字信息. It is categorised as a Read tool in the Web Fetch MCP Server, which means it retrieves data without modifying state.
Register the Web Fetch MCP server in PolicyLayer and add a rule for fetch_page_text: 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 Web Fetch. Nothing to install.
fetch_page_text 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 fetch_page_text 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 fetch_page_text. 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.
fetch_page_text is provided by the Web Fetch MCP server (xiaozhuabcd1234/web-fetch-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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