User \u00b7 mutation deleteUser. Variables: user. Example variables: {\
AI agents call delete_user to permanently remove resources in ReliaQuest GreyMatter MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Deletion of users is an irreversible, destructive action that cannot be recovered and has broad security and operational impact. Users may own data, permissions, audit trails, and account histories that are lost when a user is deleted. An AI agent with access to this tool could disable legitimate users, create access control violations, or disrupt organizational operations.
From the tool's definition Tool name is 'delete_user' and description indicates it is a 'mutation deleteUser' — a GraphQL mutation that irreversibly removes a user from the system. This is a delete operation that cannot be undone.
Attacks that exploit this kind of access
User \u00b7 mutation deleteUser. Variables: user. Example variables: {\. It is categorised as a Destructive tool in the ReliaQuest GreyMatter MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the ReliaQuest GreyMatter MCP Server MCP server in PolicyLayer and add a rule for delete_user: 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 ReliaQuest GreyMatter MCP Server. Nothing to install.
delete_user 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_user 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_user. 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_user is provided by the ReliaQuest GreyMatter MCP Server MCP server (space-c0wboy/reliaquest-greymatter-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.
Teams ship this data inside their own products. See what a licence covers →