Revoke a currently-active JIT access grant. Destructive —
AI agents call revoke_access to permanently remove resources in KVMFleet MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Revoking active JIT (Just-In-Time) access is an irreversible action that immediately terminates user permissions. While not data deletion, it destroys an active access state/grant that cannot be recovered without explicit re-approval. This fits the Destructive category as it's a one-way action with consequences that require additional steps to reverse.
From the tool's definition Tool name 'revoke_access' combined with explicit description marker 'Destructive —' and the irreversible nature of revoking an active access grant. The action cannot be easily undone without re-granting access through a separate process.
Attacks that exploit this kind of access
Revoke a currently-active JIT access grant. Destructive —. It is categorised as a Destructive tool in the KVMFleet MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the KVMFleet MCP Server MCP server in PolicyLayer and add a rule for revoke_access: 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 KVMFleet MCP Server. Nothing to install.
revoke_access 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_access 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_access. 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_access is provided by the KVMFleet MCP Server MCP server (kvmfleet/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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