Delete an existing share
AI agents call delete-share to permanently remove resources in Nextcloud — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Deleting a share is a destructive action that irreversibly removes access permissions and cannot be undone without recreating the share. While not data deletion per se, it permanently revokes sharing relationships and access rights.
From the tool's definition Tool name is 'delete-share' with description 'Delete an existing share'. The verb 'delete' indicates irreversible removal of a share resource.
Attacks that exploit this kind of access
Delete an existing share. It is categorised as a Destructive tool in the Nextcloud MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Nextcloud MCP server in PolicyLayer and add a rule for delete-share: 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 Nextcloud. Nothing to install.
delete-share 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-share 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-share. 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-share is provided by the Nextcloud MCP server (nextcloud-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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