vault_execute · Kova Mind MCP Server MCP: Risk & Policy

WHAT IT DOES

What vault_execute does on Kova Mind MCP Server

AI agents invoke vault_execute to trigger actions in Kova Mind MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why vault_execute needs a policy

This tool executes actions via stored credentials in a secure vault. Although the credential itself is not exposed, the tool permits running arbitrary external operations (authenticated by the credential) whose side effects depend on what action is specified. This matches the Execute category: 'runs code, shell commands, browser actions, or triggers external operations whose effects depend on arguments'.

From the tool's definition Tool name 'vault_execute' explicitly states 'Execute an action', and the description confirms it 'Execute[s] an action using a credential', making this an action-execution tool rather than a read or write operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vault_execute Rate-limited

vault_execute stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "vault_execute": {
      "limits": [
        {
          "counter": "vault_execute_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Kova Mind MCP Server, so you can run agents against it safely.

FAQ

Questions about vault_execute

What does the vault_execute tool do? +

Execute an action using a credential. The credential is never exposed to you — it flows through a secure side channel. It is categorised as a Execute tool in the Kova Mind MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on vault_execute? +

Register the Kova Mind MCP Server MCP server in PolicyLayer and add a rule for vault_execute: 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 Kova Mind MCP Server. Nothing to install.

What risk level is vault_execute? +

vault_execute is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit vault_execute? +

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

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

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