Get full documentation for an NPM package
AI agents call get_npm_package_doc to retrieve information from MCP Package Docs 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 queries structured documentation for NPM packages. It has no side effects—it does not create, modify, delete, or execute code. The action is purely informational and read-only, fitting the 'Read' category with low severity since documentation retrieval poses minimal security risk.
From the tool's definition Tool name 'get_npm_package_doc' and description 'Get full documentation for an NPM package' indicate retrieval of package documentation without modification, deletion, or execution of code.
Documented attack patterns abuse exactly the kind of access get_npm_package_doc gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Package Docs Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_npm_package_doc:
{
"version": "1",
"default": "deny",
"tools": {
"get_npm_package_doc": {}
}
}get_npm_package_doc is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get full documentation for an NPM package. It is categorised as a Read tool in the MCP Package Docs Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Package Docs Server MCP server in PolicyLayer and add a rule for get_npm_package_doc: 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 MCP Package Docs Server. Nothing to install.
get_npm_package_doc 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 get_npm_package_doc 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 get_npm_package_doc. 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.
get_npm_package_doc is provided by the MCP Package Docs Server MCP server (sammcj/mcp-package-docs). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 13 MCP Package Docs Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
13 MCP Package Docs Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.