Fetch a website and return its main content parsed by Mozilla Readability, converted to Markdown. Strips away navigation, ads, and boilerplate. Ideal for articles and blog posts.
AI agents call fetch_readable to retrieve information from Mcp Fetch Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a data retrieval operation with no side effects. It fetches remote content and parses it for readability but does not modify, delete, or execute anything. The blast radius of misuse is minimal—an attacker could retrieve sensitive information from accessible URLs, but this is a read-only operation.
From the tool's definition Tool name 'fetch_readable' and description states it 'Fetch[es] a website and return[s] its main content' with conversion to Markdown. No write, execute, destructive, or financial operations are performed.
Attacks that exploit this kind of access
Fetch a website and return its main content parsed by Mozilla Readability, converted to Markdown. Strips away navigation, ads, and boilerplate. Ideal for articles and blog posts. It is categorised as a Read tool in the Mcp Fetch Server MCP Server, which means it retrieves data without modifying state.
Register the Mcp Fetch Server MCP server in PolicyLayer and add a rule for fetch_readable: 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 Mcp Fetch Server. Nothing to install.
fetch_readable 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_readable 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_readable. 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_readable is provided by the Mcp Fetch Server MCP server (mcp-fetch-server). 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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