cache_delete

THE RISK

Critical Risk

Why cache_delete needs a policy

This tool performs a destructive operation by deleting cached data. While the blast radius may be limited depending on what data is stored in the cache, the deletion is irreversible. If an AI agent misuses this tool and deletes critical cached values needed for application functionality, it could cause service disruptions or data loss.

From the tool's definition The tool is named 'cache_delete' and the description explicitly states 'Delete a value from the cache.' The use of 'Delete' indicates an irreversible removal operation.

Documented attack patterns abuse exactly the kind of access cache_delete gives an agent:

POLICY

How to control cache_delete

PolicyLayer is an MCP gateway — it sits between your AI agents and AWS Labs Amazon Kendra Index MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for cache_delete:

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "cache_delete"
  ]
}

cache_delete disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

Create a free account and register AWS Labs Amazon Kendra Index MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More AWS Labs Amazon Kendra Index MCP Server tools

Destructive bulk_delete_by_criteria bulk_delete_by_criteria Destructive cache_delete_many Delete multiple values from the cache. Destructive cache_delete_multi Delete multiple values from the cache (alias for delete_many). Destructive delete delete Destructive delete_access_key delete_access_key Destructive delete_agent_runtime delete_agent_runtime Destructive delete_agent_runtime_endpoint delete_agent_runtime_endpoint Destructive delete_app delete_app

All 805 AWS Labs Amazon Kendra Index MCP Server tools →

Destructive tools on other servers

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Go deeper

Critical-risk tools in AWS Labs Amazon Kendra Index MCP Server → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about cache_delete

What does the cache_delete tool do? +

Delete a value from the cache. It is categorised as a Destructive tool in the AWS Labs Amazon Kendra Index MCP Server 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 cache_delete? +

Register the AWS Labs Amazon Kendra Index MCP Server MCP server in PolicyLayer and add a rule for cache_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 AWS Labs Amazon Kendra Index MCP Server. Nothing to install.

What risk level is cache_delete? +

cache_delete 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 cache_delete? +

Yes. Add a rate_limit block to the cache_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.

How do I block cache_delete completely? +

Set action: deny in the PolicyLayer policy for cache_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.

What MCP server provides cache_delete? +

cache_delete is provided by the AWS Labs Amazon Kendra Index MCP Server MCP server (awslabs.amazon-kendra-index-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every AWS Labs Amazon Kendra Index MCP Server tool call.

Start from AWS Labs Amazon Kendra Index MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →