Revoke a message API token. The token will no longer be usable for message operations. This action cannot be undone.
AI agents call revoke_message_token to permanently remove resources in TrekMail MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool permanently and irreversibly revokes API token access. Once revoked, the token becomes unusable and the operation cannot be reversed. This fits the Destructive category (irreversibly deletes or overwrites data/access) rather than Write (which is reversible). The high severity reflects that unauthorized revocation could disrupt legitimate message operations and integrations, causing service degradation.
From the tool's definition "Revoke a message API token. The token will no longer be usable for message operations. This action cannot be undone." - explicitly states the action cannot be undone, indicating irreversible destruction of API token functionality.
Attacks that exploit this kind of access
Revoke a message API token. The token will no longer be usable for message operations. This action cannot be undone. It is categorised as a Destructive tool in the TrekMail MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the TrekMail MCP Server MCP server in PolicyLayer and add a rule for revoke_message_token: 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 TrekMail MCP Server. Nothing to install.
revoke_message_token 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 revoke_message_token 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 revoke_message_token. 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.
revoke_message_token is provided by the TrekMail MCP Server MCP server (trekmail/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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