Clear the score timeline cache used for tier trajectory tracking. Resets all historical tier data. Use when starting a new session or after config changes.
AI agents call clear_score_timeline to permanently remove resources in PropProfessor MCP — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool permanently removes stored historical data (score timeline cache and tier trajectory history) without a mechanism to recover or restore it. While the data may be recalculated in some scenarios, the deliberate clearing of 'all historical tier data' constitutes destructive action.
From the tool's definition Tool description explicitly states 'Clear the score timeline cache' and 'Resets all historical tier data', which are irreversible operations that destroy cached historical information.
Attacks that exploit this kind of access
Clear the score timeline cache used for tier trajectory tracking. Resets all historical tier data. Use when starting a new session or after config changes. It is categorised as a Destructive tool in the PropProfessor MCP MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the PropProfessor MCP server in PolicyLayer and add a rule for clear_score_timeline: 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 PropProfessor MCP. Nothing to install.
clear_score_timeline 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 clear_score_timeline 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 clear_score_timeline. 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.
clear_score_timeline is provided by the PropProfessor MCP server (j17drake/propprofessor-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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