prune_backups
Report (dry_run=true) or delete the oldest zips, keeping the
This record as markdown: /tools/mcp-hands/prune-backups.md
What prune_backups does on Mcp Hands
AI agents call prune_backups to permanently remove resources in Mcp Hands, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Why prune_backups is rated Critical
An AI agent that decides to call prune_backups doesn't hesitate, doesn't double-check, and doesn't stop at one. Whatever it removes from Mcp Hands is gone. There is no undo for destructive operations.
Attacks that exploit this kind of access
The rule that runs prune_backups safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp Hands, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For prune_backups, this is the rule to start with:
prune_backups is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.
The button opens the PolicyLayer dashboard: create your workspace, connect Mcp Hands, apply this rule, and every prune_backups call is checked against it from then on.
Questions about prune_backups
Report (dry_run=true) or delete the oldest zips, keeping the. It is categorised as a Destructive tool in the Mcp Hands MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Mcp Hands MCP server in PolicyLayer and add a rule for prune_backups: 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 Mcp Hands. Nothing to install.
prune_backups 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_backups 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_backups. 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_backups is provided by the Mcp Hands MCP server (huocai250/mcp-hands). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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