Fetch npm registry metadata for a specific package.
AI agents call get_package_metadata to retrieve information from Universal Mcp Toolkit without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves publicly available package information from the npm registry. It is a simple data lookup operation that does not create, modify, delete, or execute any code. The blast radius of misuse is minimal—an agent could at most gather information about packages, which is already public and non-sensitive. No destructive, financial, or execution capabilities are present.
From the tool's definition Tool fetches npm registry metadata for a specific package. The verb 'Fetch' and the scope of 'metadata' indicate a read-only retrieval operation with no side effects or modification capability.
Attacks that exploit this kind of access
Fetch npm registry metadata for a specific package. It is categorised as a Read tool in the Universal Mcp Toolkit MCP Server, which means it retrieves data without modifying state.
Register the Universal Mcp Toolkit MCP server in PolicyLayer and add a rule for get_package_metadata: 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 Universal Mcp Toolkit. Nothing to install.
get_package_metadata 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_package_metadata 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_package_metadata. 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_package_metadata is provided by the Universal Mcp Toolkit MCP server (markgatcha/universal-mcp-toolkit). 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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