Delete a session. Free (0 credits).
AI agents call delete_session to permanently remove resources in Jikan — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool irreversibly deletes user data (a session record). While the blast radius is limited to a single session rather than an entire system, the deletion is permanent and cannot be undone. This places it in the Destructive category as the most severe applicable risk.
From the tool's definition Tool name is 'delete_session' with description 'Delete a session' - uses the verb 'Delete' which indicates irreversible removal of data. The tool permanently removes a session record that cannot be restored.
Attacks that exploit this kind of access
Delete a session. Free (0 credits). It is categorised as a Destructive tool in the Jikan MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Jikan MCP server in PolicyLayer and add a rule for delete_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 Jikan. Nothing to install.
delete_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 delete_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 delete_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.
delete_session is provided by the Jikan MCP server (thunderrabbit/jikan). 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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