check_kafka

Check Apache Kafka broker availability. Sends a minimal API Versions request (Kafka protocol v0) and verifies a valid Kafka response frame is returned.

SERVERMcp Nettools SOURCEaaronckj/mcp-nettools

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/aaronckj-mcp-nettools/check-kafka.md

WHAT IT DOES

What check_kafka does on Mcp Nettools

AI agents call check_kafka to retrieve information from Mcp Nettools without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why check_kafka is rated Low

The tool performs a read-only connectivity check against a Kafka broker by sending a minimal API Versions request and verifying the response. It does not modify, create, or delete any data, nor does it trigger any side-effecting operations. This is purely diagnostic/monitoring in nature.

From the tool's definition Check Apache Kafka broker availability. Sends a minimal API Versions request (Kafka protocol v0) and verifies a valid Kafka response frame is returned.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs check_kafka safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp Nettools, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For check_kafka, this is the rule to start with:

check_kafka Allowed

check_kafka is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "check_kafka": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp Nettools, apply this rule, and every check_kafka call is checked against it from then on.

FAQ

Questions about check_kafka

What does the check_kafka tool do? +

Check Apache Kafka broker availability. Sends a minimal API Versions request (Kafka protocol v0) and verifies a valid Kafka response frame is returned. It is categorised as a Read tool in the Mcp Nettools MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on check_kafka? +

Register the Mcp Nettools MCP server in PolicyLayer and add a rule for check_kafka: 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 Mcp Nettools. Nothing to install.

What risk level is check_kafka? +

check_kafka is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit check_kafka? +

Yes. Add a rate_limit block to the check_kafka 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 check_kafka completely? +

Set action: deny in the PolicyLayer policy for check_kafka. 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 check_kafka? +

check_kafka is provided by the Mcp Nettools MCP server (aaronckj/mcp-nettools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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