Fetch the version of a package in a given Ubuntu series.
AI agents call get_version to retrieve information from Ubuntu MCP Servers without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves package version information from Ubuntu systems. It performs a simple lookup operation without creating, modifying, deleting, or executing any code. The action is read-only and returns existing data based on query parameters (package name and Ubuntu series). There is no blast radius from misuse—an agent querying arbitrary package versions poses no risk to system integrity or security.
From the tool's definition Tool name 'get_version' and description 'Fetch the version of a package in a given Ubuntu series' — uses 'Fetch' which indicates data retrieval with no modification or side effects.
Attacks that exploit this kind of access
Fetch the version of a package in a given Ubuntu series. It is categorised as a Read tool in the Ubuntu MCP Servers MCP Server, which means it retrieves data without modifying state.
Register the Ubuntu MCP Servers MCP server in PolicyLayer and add a rule for get_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 Ubuntu MCP Servers. Nothing to install.
get_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 get_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 get_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.
get_version is provided by the Ubuntu MCP Servers MCP server (lvoytek/ubuntu-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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