c4_meta

A other tool on the C4REQBER MCP server.

SERVERC4REQBER SOURCEC4MIND/C4REQBER

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/c4reqber/c4-meta.md

WHAT IT DOES

What c4_meta does on C4REQBER

AI agents call c4_meta as a supporting operation in C4REQBER workflows.

RISK

Why c4_meta is rated Low

With no description available, the tool's behavior cannot be determined. The name 'c4_meta' suggests metadata retrieval (a Read operation), but without confirmation, confidence is very low. Given the server is described as a 'read-only mirror', a metadata tool is likely Read/low severity, but the empty description forces a conservative classification of Other with low confidence.

From the tool's definition Tool name is 'c4_meta' and the description is empty or uninformative.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs c4_meta safely

PolicyLayer is an MCP gateway: it sits between your AI agents and C4REQBER, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For c4_meta, this is the rule to start with:

c4_meta Rate-limited

c4_meta 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": {
    "c4_meta": {
      "limits": [
        {
          "counter": "c4_meta_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 C4REQBER, apply this rule, and every c4_meta call is checked against it from then on.

FAQ

Questions about c4_meta

What does the c4_meta tool do? +

c4_meta is a other tool on the C4REQBER MCP server. It is categorised as a Other tool in the C4REQBER MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on c4_meta? +

Register the C4REQBER MCP server in PolicyLayer and add a rule for c4_meta: 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 C4REQBER. Nothing to install.

What risk level is c4_meta? +

c4_meta is a Other tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit c4_meta? +

Yes. Add a rate_limit block to the c4_meta 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 c4_meta completely? +

Set action: deny in the PolicyLayer policy for c4_meta. 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 c4_meta? +

c4_meta is provided by the C4REQBER MCP server (C4MIND/C4REQBER). 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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This server

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The MCP Attack Database →

Guides

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