Purge Cloudflare CDN cache for a site. Without urls: purges all cached content for the site's subdomain. With urls: purges only the specified URLs (max 30 per call). Requires: API key with write scope. Args: slug: Site identifier urls: Optional list of specific URLs to purge (e.g. ["https://my-si...
Part of the BorealHost server.
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AI agents may call cloudflare_purge_cache to permanently remove or destroy resources in BorealHost. Without a policy, an autonomous agent could delete critical data in a loop with no way to undo the damage. PolicyLayer blocks destructive tools by default and requires explicit human approval before enabling them.
Without a policy, an AI agent could call cloudflare_purge_cache in a loop, permanently destroying resources in BorealHost. There is no undo for destructive operations. PolicyLayer blocks this tool by default and only allows it when a human explicitly approves the action.
Destructive tools permanently remove data. Block by default. Only enable with explicit approval workflows.
{
"version": "1",
"default": "deny",
"hide": [
"cloudflare_purge_cache"
]
}See the full BorealHost policy for all 95 tools.
These attack patterns abuse exactly the kind of access cloudflare_purge_cache gives an agent. Each links to the full case and the policy that stops it:
Other destructive tools across the catalogue. The same approach applies to each: deny by default, or require human approval.
Purge Cloudflare CDN cache for a site. Without urls: purges all cached content for the site's subdomain. With urls: purges only the specified URLs (max 30 per call). Requires: API key with write scope. Args: slug: Site identifier urls: Optional list of specific URLs to purge (e.g. ["https://my-site.borealhost.ai/style.css"]) Returns: {"purged": true, "scope": "host", "domain": "my-site.borealhost.ai"}. It is categorised as a Destructive tool in the BorealHost MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the BorealHost MCP server in PolicyLayer and add a rule for cloudflare_purge_cache: 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 BorealHost. Nothing to install.
cloudflare_purge_cache 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 cloudflare_purge_cache 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 cloudflare_purge_cache. 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.
cloudflare_purge_cache is provided by the BorealHost MCP server (pypi:borealhost-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 95 BorealHost tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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