Validate a Swift file using swiftc type checking and return compilation errors.
AI agents call swift_validate_file to retrieve information from SwiftLens without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs static analysis (type checking) and returns diagnostic information about Swift files. It is purely informational—no data is created, modified, deleted, or executed. The tool integrates with SwiftLens's semantic analysis capabilities to provide compiler-grade code understanding without side effects. It aligns with the Read category as a query/analysis operation.
From the tool's definition Tool name 'swift_validate_file' and description 'Validate a Swift file using swiftc type checking and return compilation errors' indicate read-only compilation analysis. No file modification, deletion, code execution, or side effects are mentioned.
Documented attack patterns abuse exactly the kind of access swift_validate_file gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and SwiftLens, and nothing reaches the server without passing your rules. This is the rule we recommend for swift_validate_file:
{
"version": "1",
"default": "deny",
"tools": {
"swift_validate_file": {}
}
}swift_validate_file is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Validate a Swift file using swiftc type checking and return compilation errors. It is categorised as a Read tool in the SwiftLens MCP Server, which means it retrieves data without modifying state.
Register the SwiftLens MCP server in PolicyLayer and add a rule for swift_validate_file: 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 SwiftLens. Nothing to install.
swift_validate_file is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the swift_validate_file 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_validate_file. 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_validate_file is provided by the SwiftLens MCP server (swiftlens/swiftlens). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 15 SwiftLens tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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15 SwiftLens tools catalogued and risk-classified — across an index of 42,500+ MCP servers.