List all keys in a Workers KV namespace. Supports pagination and prefix filtering.
AI agents call list_kv_keys to retrieve information from Cloudflare MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and enumerates keys from a KV namespace without creating, modifying, deleting, or executing any operations. It is a pure read operation with no side effects. The low severity reflects that listing keys alone does not expose sensitive data values, allow modifications, or trigger external actions—it only provides metadata about key existence within a namespace.
From the tool's definition Tool name 'list_kv_keys' and description 'List all keys in a Workers KV namespace' indicate data retrieval only. The phrase 'Supports pagination and prefix filtering' confirms it is a read-only query operation with no modification or deletion capability.
Attacks that exploit this kind of access
List all keys in a Workers KV namespace. Supports pagination and prefix filtering. It is categorised as a Read tool in the Cloudflare MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Cloudflare MCP Server MCP server in PolicyLayer and add a rule for list_kv_keys: 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 Cloudflare MCP Server. Nothing to install.
list_kv_keys is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_kv_keys 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 list_kv_keys. 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.
list_kv_keys is provided by the Cloudflare MCP Server MCP server (ry-ops/cloudflare-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
list_kv_keys is one line of Cloudflare MCP Server's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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