Find all references to a symbol across multiple Swift files. Prefer relative paths (e.g., 'src/MyFile.swift').
AI agents call swift_find_symbol_references_files 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 a read-only query operation across Swift source files using SourceKit-LSP to locate symbol references. It retrieves data about code structure and usage patterns with no side effects—no code is modified, executed, deleted, or deployed. The blast radius of misuse is minimal; an agent could only retrieve information about code organization.
From the tool's definition Tool description states 'Find all references to a symbol across multiple Swift files' and 'Prefer relative paths'. The verb is 'find' and the operation retrieves information about where symbols are used without modifying code or triggering external operations.
Documented attack patterns abuse exactly the kind of access swift_find_symbol_references_files 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_find_symbol_references_files:
{
"version": "1",
"default": "deny",
"tools": {
"swift_find_symbol_references_files": {}
}
}swift_find_symbol_references_files is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Find all references to a symbol across multiple Swift files. Prefer relative paths (e.g., 'src/MyFile.swift'). 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_find_symbol_references_files: 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_find_symbol_references_files 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_find_symbol_references_files 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_find_symbol_references_files. 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_find_symbol_references_files 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.
Free to start. No card required.
15 SwiftLens tools catalogued and risk-classified — across an index of 42,500+ MCP servers.