Low Risk

kai_tests

Find test files that cover a given source file.

Risk signalsAccepts file system path (file)

Part of the Kai server.

kai_tests is read-only, but an agent in a loop can still rack up calls and cost. PolicyLayer caps every call before it runs. Live in minutes.

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AI agents call kai_tests to retrieve information from Kai without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.

Even though kai_tests only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.

Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "kai_tests": {}
  }
}

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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These attack patterns abuse exactly the kind of access kai_tests 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_tests only ever does what you allow.

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Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.

What does the kai_tests tool do? +

Find test files that cover a given source file.. It is categorised as a Read tool in the Kai MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on kai_tests? +

Register the Kai MCP server in PolicyLayer and add a rule for kai_tests: 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_tests? +

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

Can I rate-limit kai_tests? +

Yes. Add a rate_limit block to the kai_tests 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_tests completely? +

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

kai_tests 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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