fetch_batch
AI agents call fetch_batch to retrieve information from FetchV2 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 batch retrieval of web content, which is a read-only operation with no side effects. Although the tool description is empty, the server's stated purpose and the sibling tools (discover_links, fetch) all align with data retrieval. Batch fetching multiple URLs is still fundamentally a Read operation—it queries external web resources and returns content.
From the tool's definition The server is described as enabling 'fetching webpages' and 'batch fetching up to 10 URLs'. The tool name 'fetch_batch' combined with the server's core functionality of web content fetching indicates this tool retrieves data from multiple URLs without…
Attacks that exploit this kind of access
fetch_batch. It is categorised as a Read tool in the FetchV2 MCP Server MCP Server, which means it retrieves data without modifying state.
Register the FetchV2 MCP Server MCP server in PolicyLayer and add a rule for fetch_batch: 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 FetchV2 MCP Server. Nothing to install.
fetch_batch 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_batch 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_batch. 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_batch is provided by the FetchV2 MCP Server MCP server (praveenc/fetchv2-mcp-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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