flagpost_list_flags

THE RISK

Low Risk

Why flagpost_list_flags needs a policy

This tool only queries and returns information about existing feature flags without creating, modifying, deleting, or executing any operations. It has no side effects and poses minimal security risk - the information returned would typically be non-sensitive configuration metadata. The blast radius of misuse is limited to information disclosure.

From the tool's definition Tool description states it 'Lists all feature flags defined in a flagpost.config.ts file, showing their names and default values.' The verb 'lists' and the read-only nature of retrieving flag metadata with no modification capability indicates this is a data…

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

POLICY

How to control flagpost_list_flags

PolicyLayer is an MCP gateway — it sits between your AI agents and Clocktower, and nothing reaches the server without passing your rules. This is the rule we recommend for flagpost_list_flags:

policy.json

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

flagpost_list_flags is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

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

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about flagpost_list_flags

What does the flagpost_list_flags tool do? +

Lists all feature flags defined in a flagpost.config.ts file, showing their names and default values. It is categorised as a Read tool in the Clocktower MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on flagpost_list_flags? +

Register the Clocktower MCP server in PolicyLayer and add a rule for flagpost_list_flags: 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 Clocktower. Nothing to install.

What risk level is flagpost_list_flags? +

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

Can I rate-limit flagpost_list_flags? +

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

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

flagpost_list_flags is provided by the Clocktower MCP server (sathergate/sathergate-toolkit). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Clocktower tool call.

Start from Clocktower, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →