Medium Risk

kai_unlock

Release advisory locks on files.

Part of the Kai server.

kai_unlock can modify Kai data, with no limits today. PolicyLayer puts allow, deny, and rate-limit rules on every call. Live in minutes.

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AI agents use kai_unlock to create or modify resources in Kai. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.

Without a policy, an AI agent could call kai_unlock repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Kai.

Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "kai_unlock": {
      "limits": [
        {
          "counter": "kai_unlock_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

See the full Kai policy for all 18 tools.

Get this rule live on your own Kai server in minutes. PolicyLayer enforces it on every call, before it runs.

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View all 18 tools →

These attack patterns abuse exactly the kind of access kai_unlock gives an agent. Each links to the full case and the policy that stops it:

Browse the full MCP Attack Database →

Every attack above starts with a tool call. PolicyLayer checks each one against your policy first, so kai_unlock only ever does what you allow.

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Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.

What does the kai_unlock tool do? +

Release advisory locks on files.. It is categorised as a Write tool in the Kai MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on kai_unlock? +

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

What risk level is kai_unlock? +

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

Can I rate-limit kai_unlock? +

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

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

kai_unlock is provided by the Kai MCP server (kai-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Kai tool call.

Deterministic rules across all 18 Kai tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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4,600+ MCP servers and 31,000+ tools scanned and risk-classified.

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