Fetch a remote web page over HTTP and return its full text.
AI agents call http_fetch_tool to retrieve information from Simple MCP Tool Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves content from remote URLs and returns text—a read-only operation with no side effects on the remote system. However, severity is medium rather than low because: (1) an agent could be tricked into fetching sensitive internal URLs or IP-restricted endpoints, (2) the fetched content could contain credentials or private data, and (3) repeated fetching could constitute a denial-of-service vector…
From the tool's definition Tool name 'http_fetch_tool' and description 'Fetch a remote web page over HTTP and return its full text' indicate data retrieval with no modification or deletion.
Attacks that exploit this kind of access
Fetch a remote web page over HTTP and return its full text. It is categorised as a Read tool in the Simple MCP Tool Server MCP Server, which means it retrieves data without modifying state.
Register the Simple MCP Tool Server MCP server in PolicyLayer and add a rule for http_fetch_tool: 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 Simple MCP Tool Server. Nothing to install.
http_fetch_tool 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 http_fetch_tool 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 http_fetch_tool. 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.
http_fetch_tool is provided by the Simple MCP Tool Server MCP server (slawekradzyminski/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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