Fetches content from a URL and extracts plain text
AI agents call fetch_txt to retrieve information from Fetch MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a GET-like operation to retrieve and transform web content into plain text format. There is no creation, modification, deletion, execution, or financial transaction involved. The blast radius of misuse is limited to unauthorized information disclosure, which is a read-level risk.
From the tool's definition Tool description states it 'Fetches content from a URL and extracts plain text' — a retrieval operation with no side effects. Sibling tools (fetch_html, fetch_json, fetch_markdown) are all read-only transformations.
Attacks that exploit this kind of access
Fetches content from a URL and extracts plain text. It is categorised as a Read tool in the Fetch MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Fetch MCP Server MCP server in PolicyLayer and add a rule for fetch_txt: 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 Fetch MCP Server. Nothing to install.
fetch_txt 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_txt 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_txt. 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_txt is provided by the Fetch MCP Server MCP server (solonabot/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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