Cases \u00b7 mutation cancelCase. Variables: input. Example variables: {\
AI agents call cancel_case 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.
A GraphQL mutation named 'cancelCase' permanently changes the state of a case to cancelled, which is generally an irreversible action in incident response platforms. Cancelling a case would terminate ongoing workflows, lose associated context, and cannot typically be undone, placing it in the Destructive category with high severity given the blast radius in an incident response context.
From the tool's definition cancel_case — 'mutation cancelCase' — cancelling a case is typically an irreversible state change that terminates an active incident/investigation case
Attacks that exploit this kind of access
Cases \u00b7 mutation cancelCase. Variables: input. 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 cancel_case: 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.
cancel_case 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 cancel_case 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 cancel_case. 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.
cancel_case 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.
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