This record as markdown: /tools/io-github-lokmenower-best-cad-mcp/purge-drawing.md
What purge_drawing does on Pypi:best Cad
AI agents call purge_drawing to permanently remove resources in Pypi:best Cad, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Why purge_drawing is rated Critical
This tool permanently deletes drawing objects (layers, linetypes, text styles, blocks). While the deletions target only 'unused' items, the action cannot be undone and results in data loss. This is the defining characteristic of the Destructive category. The severity is high because accidental or malicious use could corrupt a drawing by removing essential definitions, even if they appear unused.
From the tool's definition Tool name 'purge_drawing' combined with description stating it 'deletes all unused layers, linetypes, text styles, blocks, etc.' (清理图纸：删除所有未使用的图层、线型、文字样式、块等). The operation irreversibly removes data from the drawing.
Attacks that exploit this kind of access
The rule that runs purge_drawing safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Pypi:best Cad, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For purge_drawing, this is the rule to start with:
purge_drawing is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.
The button opens the PolicyLayer dashboard: create your workspace, connect Pypi:best Cad, apply this rule, and every purge_drawing call is checked against it from then on.
Questions about purge_drawing
清理图纸：删除所有未使用的图层、线型、文字样式、块等。. It is categorised as a Destructive tool in the Pypi:best Cad MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Pypi:best Cad MCP server in PolicyLayer and add a rule for purge_drawing: 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 Pypi:best Cad. Nothing to install.
purge_drawing 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 purge_drawing 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 purge_drawing. 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.
purge_drawing is provided by the Pypi:best Cad MCP server (pypi:best-cad-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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