manage_api_keys

THE RISK

Medium Risk

Why manage_api_keys needs a policy

API key management is a Write operation because it creates and modifies credentials. While credential management has elevated risk, it is reversible (keys can be rotated or revoked). This is not Destructive because key rotation is not irreversible data loss. It is not Financial.

From the tool's definition Tool name 'manage_api_keys' and description 'Manage Kernel API keys' indicates creation, modification, or deletion of API keys. The description is truncated but 'manage' in this context typically means create, update, revoke, or rotate credentials.

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

POLICY

How to control manage_api_keys

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "manage_api_keys": {
      "limits": [
        {
          "counter": "manage_api_keys_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

manage_api_keys stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

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

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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All 16 Kernel MCP Server tools →

Write tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about manage_api_keys

What does the manage_api_keys tool do? +

Manage Kernel API keys. Use. It is categorised as a Write tool in the Kernel MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on manage_api_keys? +

Register the Kernel MCP Server MCP server in PolicyLayer and add a rule for manage_api_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 Kernel MCP Server. Nothing to install.

What risk level is manage_api_keys? +

manage_api_keys is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit manage_api_keys? +

Yes. Add a rate_limit block to the manage_api_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.

How do I block manage_api_keys completely? +

Set action: deny in the PolicyLayer policy for manage_api_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.

What MCP server provides manage_api_keys? +

manage_api_keys is provided by the Kernel MCP Server MCP server (kernel/kernel-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Kernel MCP Server tool call.

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

CHECK YOUR STACK →