Revoke an active session key for a wallet.
AI agents call revoke_session to permanently remove resources in Tenzro Ledger MCP — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Revoking a session key is an irreversible action that immediately and permanently invalidates the session's authorization. This cannot be undone — the session is terminated and the key is invalidated, which could disrupt active operations or lock out legitimate users. Given the financial context (wallet), misuse could have significant impact.
From the tool's definition Revoke an active session key for a wallet
Attacks that exploit this kind of access
Revoke an active session key for a wallet. It is categorised as a Destructive tool in the Tenzro Ledger MCP MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Tenzro Ledger MCP server in PolicyLayer and add a rule for revoke_session: 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 Tenzro Ledger MCP. Nothing to install.
revoke_session 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_session 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_session. 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_session is provided by the Tenzro Ledger MCP server (https://canton-mcp.tenzro.network/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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