AI agents call read_enclosing to retrieve information from Largefile without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool name and server context strongly indicate this retrieves or queries data (likely reading enclosing context around a location in a file). No evidence suggests modification, deletion, code execution, or financial operations. This is a Read operation with low severity due to lack of side effects.
From the tool's definition Tool name 'read_enclosing' suggests reading/retrieving data without modification. Server's stated purpose is to 'Navigate, search, and edit large codebases' with sibling tools including 'read_content' and 'search_content', indicating a read-family operation.
Documented attack patterns abuse exactly the kind of access read_enclosing gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Largefile, and nothing reaches the server without passing your rules. This is the rule we recommend for read_enclosing:
{
"version": "1",
"default": "deny",
"tools": {
"read_enclosing": {}
}
}read_enclosing is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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read_enclosing. It is categorised as a Read tool in the Largefile MCP Server, which means it retrieves data without modifying state.
Register the Largefile MCP server in PolicyLayer and add a rule for read_enclosing: 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 Largefile. Nothing to install.
read_enclosing 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 read_enclosing 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 read_enclosing. 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.
read_enclosing is provided by the Largefile MCP server (peteretelej/largefile). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Largefile, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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8 Largefile tools catalogued and risk-classified — across an index of 43,000+ MCP servers.