Read a single file from a package using the
AI agents call package_file_contents to retrieve information from Socket MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and returns file contents from packages without creating, modifying, deleting, or executing anything. It is a straightforward read operation that queries package data. The low severity reflects the limited blast radius—an AI agent using this tool could only view existing package information, not alter systems or data.
From the tool's definition Tool name 'package_file_contents' and description 'Read a single file from a package' indicates retrieval of package file contents with no modification or side effects.
Documented attack patterns abuse exactly the kind of access package_file_contents gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Socket MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for package_file_contents:
{
"version": "1",
"default": "deny",
"tools": {
"package_file_contents": {}
}
}package_file_contents is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Read a single file from a package using the. It is categorised as a Read tool in the Socket MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Socket MCP Server MCP server in PolicyLayer and add a rule for package_file_contents: 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 Socket MCP Server. Nothing to install.
package_file_contents 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 package_file_contents 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 package_file_contents. 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.
package_file_contents is provided by the Socket MCP Server MCP server (socketdev/socket-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 7 Socket MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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7 Socket MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.