AI agents call check_package_version to retrieve information from Grounded without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a straightforward lookup of package version information from public registries. It has no side effects, does not modify data, does not execute code, and does not involve financial transactions. The operation is a read-only query of publicly available information, representing minimal risk even if misused by an AI agent.
From the tool's definition Tool name 'check_package_version' and description 'Check the latest version of a package on npm or PyPI' indicate a query operation that retrieves package metadata without modifying data or executing code.
Attacks that exploit this kind of access
Check the latest version of a package on npm or PyPI. It is categorised as a Read tool in the Grounded MCP Server, which means it retrieves data without modifying state.
Register the Grounded MCP server in PolicyLayer and add a rule for check_package_version: 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 Grounded. Nothing to install.
check_package_version 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 check_package_version 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 check_package_version. 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.
check_package_version is provided by the Grounded MCP server (nghizas/grounded-mcp). 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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