Returns prioritised list of files needing test coverage, with structural context from RailsInsight and per-method coverage data from SimpleCov.
AI agents call get_coverage_gaps to retrieve information from Rails Insight without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves test coverage analysis data. It has no side effects—it reads existing coverage metrics and analysis outputs without modifying, deleting, or executing anything. The blast radius of misuse is minimal; an agent could only obtain information about test gaps, not alter code or systems.
From the tool's definition The tool 'get_coverage_gaps' returns a prioritised list of files needing test coverage with data from RailsInsight and SimpleCov. The verb 'returns' and 'get_' prefix indicate data retrieval.
Attacks that exploit this kind of access
Returns prioritised list of files needing test coverage, with structural context from RailsInsight and per-method coverage data from SimpleCov. It is categorised as a Read tool in the Rails Insight MCP Server, which means it retrieves data without modifying state.
Register the Rails Insight MCP server in PolicyLayer and add a rule for get_coverage_gaps: 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 Rails Insight. Nothing to install.
get_coverage_gaps 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 get_coverage_gaps 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 get_coverage_gaps. 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.
get_coverage_gaps is provided by the Rails Insight MCP server (@reinteractive/rails-insight). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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