Permanently delete a Mailosaur server and all contained messages.
AI agents call mailosaur_servers_delete to permanently remove resources in Mailosaur MCP — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool irreversibly deletes data (server and all associated messages) and cannot be undone. Destructive is the correct category per the classification rules. Severity is high because an AI agent misusing this could permanently lose all test messages and server configuration for an organization. Confidence is very high given explicit 'Permanently delete' language in the description.
From the tool's definition Tool name includes 'delete' and description states 'Permanently delete a Mailosaur server and all contained messages.' The use of 'Permanently' and 'all contained messages' indicates irreversible deletion of data.
Attacks that exploit this kind of access
Permanently delete a Mailosaur server and all contained messages. It is categorised as a Destructive tool in the Mailosaur MCP MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Mailosaur MCP server in PolicyLayer and add a rule for mailosaur_servers_delete: 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 Mailosaur MCP. Nothing to install.
mailosaur_servers_delete 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 mailosaur_servers_delete 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 mailosaur_servers_delete. 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.
mailosaur_servers_delete is provided by the Mailosaur MCP server (mrnewdelhi/mailosaur-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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