AI agents call reset_performance_metrics to permanently remove resources in Mnemex — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Resetting all performance metrics irreversibly clears accumulated historical data about system performance. This action cannot be undone — once metrics are reset, the historical baseline and trends are permanently lost. This qualifies as Destructive rather than Write, since it permanently destroys data rather than modifying it reversibly.
From the tool's definition Reset all performance metrics
Documented attack patterns abuse exactly the kind of access reset_performance_metrics gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mnemex, and nothing reaches the server without passing your rules. This is the rule we recommend for reset_performance_metrics:
{
"version": "1",
"default": "deny",
"hide": [
"reset_performance_metrics"
]
}reset_performance_metrics disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
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Reset all performance metrics. It is categorised as a Destructive tool in the Mnemex MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Mnemex MCP server in PolicyLayer and add a rule for reset_performance_metrics: 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 Mnemex. Nothing to install.
reset_performance_metrics 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 reset_performance_metrics 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 reset_performance_metrics. 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.
reset_performance_metrics is provided by the Mnemex MCP server (prefrontal-systems/cortexgraph). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 13 Mnemex tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
13 Mnemex tools catalogued and risk-classified — across an index of 42,500+ MCP servers.