list_containers
AI agents call list_containers to retrieve information from Beszel MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The 'list_containers' tool retrieves or enumerates container information without modifying state. Despite the description being empty, the naming convention and context of sibling read-only tools ('list_*', 'query_*') strongly indicate this is a simple data retrieval operation with no side effects. This is consistent with monitoring infrastructure queries.
From the tool's definition Tool name 'list_containers' and sibling tools like 'list_alerts', 'list_systems', 'query_container_stats', 'query_system_stats' indicate read-only data retrieval operations.
Attacks that exploit this kind of access
list_containers. It is categorised as a Read tool in the Beszel MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Beszel MCP Server MCP server in PolicyLayer and add a rule for list_containers: 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 Beszel MCP Server. Nothing to install.
list_containers 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_containers 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_containers. 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_containers is provided by the Beszel MCP Server MCP server (red5d/beszel-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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