Revoke a mandate. The on-chain session key is not uninstalled (manual via Console if needed); settled payments are unaffected.
AI agents call payments_mandates_revoke to permanently remove resources in Mailgent MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Revoking a mandate is an irreversible action that terminates authorization for future payments. The description confirms settled payments are unaffected (implying the revocation itself cannot be undone) and the on-chain session key remains but the mandate authorization is permanently revoked.
From the tool's definition Revoke a mandate. The on-chain session key is not uninstalled; settled payments are unaffected.
Attacks that exploit this kind of access
Revoke a mandate. The on-chain session key is not uninstalled (manual via Console if needed); settled payments are unaffected. It is categorised as a Destructive tool in the Mailgent MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Mailgent MCP Server MCP server in PolicyLayer and add a rule for payments_mandates_revoke: 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 Mailgent MCP Server. Nothing to install.
payments_mandates_revoke 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 payments_mandates_revoke 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 payments_mandates_revoke. 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.
payments_mandates_revoke is provided by the Mailgent MCP Server MCP server (loomal-ai/loomal-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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