noop

Does nothing

SERVERClaude Flow SOURCEclaude-flow

Low RISK CLASS

Category Other

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-ruvnet-claude-flow/noop.md

WHAT IT DOES

What noop does on Claude Flow

AI agents call noop as a supporting operation in Claude Flow workflows.

RISK

Why noop is rated Low

The tool explicitly states it does nothing, making it a no-op with no side effects, no data access, and no operations of any kind. Essentially a placeholder or heartbeat-style tool.

From the tool's definition "Does nothing"

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs noop safely

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

noop Rate-limited

noop gets a rate cap, and everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "noop": {
      "limits": [
        {
          "counter": "noop_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

SET A RULE FOR THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about noop

What does the noop tool do? +

Does nothing. It is categorised as a Other tool in the Claude Flow MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on noop? +

Register the Claude Flow MCP server in PolicyLayer and add a rule for noop: 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 Claude Flow. Nothing to install.

What risk level is noop? +

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

Can I rate-limit noop? +

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

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

noop is provided by the Claude Flow MCP server (claude-flow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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Guides

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