DISCOVERY: Find all available vCluster versions. Returns GitHub tags (stable releases) and branches (development versions). Use this to discover what versions are available before querying specific versions.
AI agents call list-versions to retrieve information from Vcluster Yaml without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves metadata about available vCluster versions from GitHub without creating, modifying, deleting, or executing any operations. It is purely informational and has no side effects. The blast radius of misuse is minimal—an agent could only learn what versions exist, which is low-risk discovery information.
From the tool's definition Tool description states 'Find all available vCluster versions' and 'Returns GitHub tags...and branches'. The verb 'Find' and 'Returns' indicate data retrieval with no modification.
Attacks that exploit this kind of access
DISCOVERY: Find all available vCluster versions. Returns GitHub tags (stable releases) and branches (development versions). Use this to discover what versions are available before querying specific versions. It is categorised as a Read tool in the Vcluster Yaml MCP Server, which means it retrieves data without modifying state.
Register the Vcluster Yaml MCP server in PolicyLayer and add a rule for list-versions: 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 Vcluster Yaml. Nothing to install.
list-versions 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 list-versions 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 list-versions. 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.
list-versions is provided by the Vcluster Yaml MCP server (vcluster-yaml-mcp-server). 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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