[Sessions] Delete one or more sessions. Stops running tests first.
AI agents call sessions_delete to permanently remove resources in CyPerf MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool permanently removes session records, which is an irreversible destructive action. While not financial or involving code execution, the deletion of testing sessions and their associated data meets the definition of Destructive—data that cannot be recovered once deleted.
From the tool's definition Tool name 'sessions_delete' combined with description 'Delete one or more sessions. Stops running tests first.' explicitly indicates irreversible deletion of session data.
Attacks that exploit this kind of access
[Sessions] Delete one or more sessions. Stops running tests first. It is categorised as a Destructive tool in the CyPerf MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the CyPerf MCP Server MCP server in PolicyLayer and add a rule for sessions_delete: 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 CyPerf MCP Server. Nothing to install.
sessions_delete 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 sessions_delete 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 sessions_delete. 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.
sessions_delete is provided by the CyPerf MCP Server MCP server (keysight/cyperf-mcp). 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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