AI agents invoke swift_test to trigger actions in Xcsift. 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.
The tool name 'swift_test' strongly implies it runs Swift tests (i.e., executes the `swift test` command or similar). Based on the server context of executing build and test commands, this tool likely executes shell-level test commands. The description is empty, which lowers confidence, but the pattern of sibling tools confirms an Execute classification.
From the tool's definition Tool name 'swift_test' on a server described as providing tools for 'executing build commands'; sibling tools include 'run_shell_build_command', 'swift_build', 'xcodebuild' — all execution-oriented tools.
Documented attack patterns abuse exactly the kind of access swift_test gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Xcsift, and nothing reaches the server without passing your rules. This is the rule we recommend for swift_test:
{
"version": "1",
"default": "deny",
"tools": {
"swift_test": {
"limits": [
{
"counter": "swift_test_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}swift_test 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.
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swift_test. It is categorised as a Execute tool in the Xcsift MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Xcsift MCP server in PolicyLayer and add a rule for swift_test: 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 Xcsift. Nothing to install.
swift_test is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the swift_test 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.
Set action: deny in the PolicyLayer policy for swift_test. 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.
swift_test is provided by the Xcsift MCP server (johnnyclem/xcsift-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Xcsift, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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9 Xcsift tools catalogued and risk-classified — across an index of 43,000+ MCP servers.