Delete an empty bucket. (Refused on read-only / production add-ons.)
AI agents call delete_bucket to permanently remove resources in Rustfs — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Bucket deletion is an irreversible operation that removes infrastructure and access to stored data. Even though the tool only deletes empty buckets (limiting blast radius), the action cannot be undone and has permanent consequences. This is more severe than Write (which is reversible) and clearly falls under Destructive. The refusal on read-only/production add-ons reflects the high risk.
From the tool's definition Tool name is 'delete_bucket' and description states 'Delete an empty bucket.' The verb 'delete' combined with the irreversible nature of bucket deletion confirms this is a destructive operation.
Attacks that exploit this kind of access
Delete an empty bucket. (Refused on read-only / production add-ons.). It is categorised as a Destructive tool in the Rustfs MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Rustfs MCP server in PolicyLayer and add a rule for delete_bucket: 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 Rustfs. Nothing to install.
delete_bucket 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 delete_bucket 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 delete_bucket. 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.
delete_bucket is provided by the Rustfs MCP server (stackblaze/rustfs-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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