Request a specific web page, return Markdown
AI agents call fetch_md to retrieve information from McpDeepResearch without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and converts web page content to Markdown format. It is purely informational—it reads data from a web page and returns it in a different format without modifying the original resource, creating new data, executing code, or causing irreversible changes. This is a classic Read operation with minimal blast radius if misused (worst case: exposure of publicly accessible web content).
From the tool's definition Tool name 'fetch_md' and description 'Request a specific web page, return Markdown' indicates retrieval of web content with no modification or side effects.
Attacks that exploit this kind of access
Request a specific web page, return Markdown. It is categorised as a Read tool in the McpDeepResearch MCP Server, which means it retrieves data without modifying state.
Register the McpDeepResearch MCP server in PolicyLayer and add a rule for fetch_md: 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 McpDeepResearch. Nothing to install.
fetch_md 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_md 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_md. 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_md is provided by the McpDeepResearch MCP server (pb-207/mcp-deep-research). 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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