Database schema with tables, columns, indexes, foreign keys, and model-to-table mapping.
AI agents call get_schema 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 is a read-only query tool that retrieves schema definitions and metadata. It does not create, modify, delete, or execute any operations—it simply provides information about database structure. The low severity reflects that schema information alone cannot be misused to cause significant harm, though it could inform a subsequent attack if combined with other tools.
From the tool's definition Tool returns database schema information including tables, columns, indexes, foreign keys, and model-to-table mapping. The description indicates retrieval of structural metadata with no side effects or modifications.
Attacks that exploit this kind of access
Database schema with tables, columns, indexes, foreign keys, and model-to-table mapping. 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_schema: 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_schema 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_schema 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_schema. 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_schema 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.
Teams ship this data inside their own products. See what a licence covers →