Delete an inbox message. Free (0 credits).
AI agents call delete_inbox 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 data (inbox messages) and cannot be undone, placing it in the Destructive category. Severity is medium rather than high because the blast radius is limited to individual messages in an inbox rather than bulk data or critical system operations. The confidence is high due to explicit use of the word 'delete' which unambiguously indicates a destructive action.
From the tool's definition Tool name is 'delete_inbox' and description states 'Delete an inbox message' - the verb 'delete' explicitly indicates irreversible removal of data.
Attacks that exploit this kind of access
Delete an inbox message. 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_inbox: 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_inbox 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_inbox 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_inbox. 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_inbox 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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