Remove all unused networks
AI agents call prune_networks to permanently remove resources in Docker MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool permanently deletes Docker networks without individual selection or confirmation per network. While the scope is limited to 'unused' networks (reducing blast radius), the operation is irreversible and affects infrastructure configuration. An AI agent calling this without understanding the environment could accidentally delete networks that applications depend on, causing service disruption.
From the tool's definition Tool name 'prune_networks' combined with description 'Remove all unused networks' indicates irreversible deletion of network resources. The verb 'remove' and scope 'all unused networks' confirm destructive behavior that cannot be undone.
Attacks that exploit this kind of access
Remove all unused networks. It is categorised as a Destructive tool in the Docker MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Docker MCP Server MCP server in PolicyLayer and add a rule for prune_networks: 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 Docker MCP Server. Nothing to install.
prune_networks is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the prune_networks 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 prune_networks. 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.
prune_networks is provided by the Docker MCP Server MCP server (swartdraak/docker-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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