// MCP TOOL REFERENCE

purge_cache

Purge cache by URL, tag, host, prefix, or everything

Can purge entire CDN cache causing load spike

Part of the MCP Cloudflare MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.

mcp-cloudflare-crunchtools Destructive Risk 5/5

// WHEN AI AGENTS USE THIS TOOL

AI agents may call purge_cache to permanently remove or destroy resources in MCP Cloudflare. Without a policy, an autonomous agent could delete critical data in a loop with no way to undo the damage. Intercept blocks destructive tools by default and requires explicit human approval before enabling them.

// WHY ENFORCE A POLICY ON PURGE_CACHE

Without a policy, an AI agent could call purge_cache in a loop, permanently destroying resources in MCP Cloudflare. There is no undo for destructive operations. Intercept blocks this tool by default and only allows it when a human explicitly approves the action.

// RECOMMENDED POLICY

Destructive tools permanently remove data. Block by default. Only enable with explicit approval workflows.

mcp-cloudflare.yaml

tools:
  purge_cache:
    rules:
      - action: deny
        reason: "Blocked by default — enable with approval"

See the full MCP Cloudflare policy for all 14 tools.

// DETAILS

Tool Name purge_cache

Category Destructive

MCP Server MCP Cloudflare MCP Server

Risk Level Critical

// MORE MCP CLOUDFLARE TOOLS

Destructive delete_dns_record Destructive delete_page_rule Write create_dns_record Write create_page_rule Write update_dns_record Write update_page_rule Read Cross-platform Read get_dns_record

View all 14 tools →

// WHAT CAN GO WRONG

Agents calling destructive-class tools like purge_cache have been implicated in these attack patterns. Read the full case and prevention policy for each:

Browse the full MCP Attack Database →

// OTHER DESTRUCTIVE TOOLS ACROSS MCP SERVERS

Other tools in the Destructive risk category across the catalogue. The same policy patterns (deny, require_approval) apply to each.

AbraFlexi contact_delete AbraFlexi evidence_delete AbraFlexi invoice_issued_delete AbraFlexi product_delete Agent Passport System — Cryptographic Identity for AI Agents remove_intent_card Agent Passport System — Cryptographic Identity for AI Agents revoke_delegation

// IN CONTEXT OF CRITICAL RISK

purge_cache is one of the critical-risk operations in MCP Cloudflare. For the full severity-focused view — only the critical-risk tools with their recommended policies — see the breakdown for this server, or browse all critical-risk tools across every MCP server.

// RELATED READING

// FAQ

What does the purge_cache tool do? +

Purge cache by URL, tag, host, prefix, or everything. It is categorised as a Destructive tool in the MCP Cloudflare MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on purge_cache? +

Add a rule in your Intercept YAML policy under the tools section for purge_cache. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the MCP Cloudflare MCP server.

What risk level is purge_cache? +

purge_cache is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit purge_cache? +

Yes. Add a rate_limit block to the purge_cache rule in your Intercept 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.

How do I block purge_cache completely? +

Set action: deny in the Intercept policy for 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.

What MCP server provides purge_cache? +

purge_cache is provided by the MCP Cloudflare MCP server (mcp-cloudflare-crunchtools). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.

purge_cache

Enforce policies on MCP Cloudflare