Analyze third-party script impact on performance (Layer 2)
AI agents call l2_third_party_impact to retrieve information from Lighthouse MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs performance analysis and auditing of third-party scripts. It retrieves and queries performance metrics without modifying any systems, executing arbitrary code, deleting data, or moving money. The analysis is read-only—it examines impact but does not change configurations, infrastructure, or financial state.
From the tool's definition Tool name contains 'Analyze' and description states 'Analyze third-party script impact on performance'; the word 'impact' in context means measurement/assessment, not modification. No verbs indicating write, execute, delete, or financial operations.
Attacks that exploit this kind of access
Analyze third-party script impact on performance (Layer 2). It is categorised as a Read tool in the Lighthouse MCP MCP Server, which means it retrieves data without modifying state.
Register the Lighthouse MCP server in PolicyLayer and add a rule for l2_third_party_impact: 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 Lighthouse MCP. Nothing to install.
l2_third_party_impact 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 l2_third_party_impact 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 l2_third_party_impact. 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.
l2_third_party_impact is provided by the Lighthouse MCP server (mizchi/lighthouse-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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