Get fully-qualified declaration contexts for all symbols in a Swift file.
AI agents call swift_get_declaration_context 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 to query and retrieve information about symbol declarations within a Swift file. It has no side effects, does not modify code, execute operations, or affect system state. The capability is analogous to IDE features that display symbol information, making it a pure Read operation with minimal risk.
From the tool's definition Tool retrieves 'fully-qualified declaration contexts for all symbols' in a Swift file. The verb 'Get' and noun 'declaration contexts' indicate read-only retrieval of metadata about code structure with no modification or execution capability.
Documented attack patterns abuse exactly the kind of access swift_get_declaration_context 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_get_declaration_context:
{
"version": "1",
"default": "deny",
"tools": {
"swift_get_declaration_context": {}
}
}swift_get_declaration_context is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get fully-qualified declaration contexts for all symbols in a Swift file. 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_get_declaration_context: 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_get_declaration_context 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_get_declaration_context 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_get_declaration_context. 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_get_declaration_context 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.