Lista instantáneas guardadas (sin el cuerpo completo del esquema).
AI agents call db_schema_list to retrieve information from Schema Engram without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and lists information about previously saved database schema snapshots. It has no side effects—it only reads and returns data. No data is created, modified, deleted, or executed. The fact that it omits the full schema body reinforces that it is a lightweight listing/enumeration operation, making it a classic Read category tool with low risk.
From the tool's definition Tool name 'db_schema_list' and description 'Lista instantáneas guardadas (sin el cuerpo completo del esquema)' [Lists saved snapshots (without the full schema body)] indicate a retrieval/query operation that returns metadata about stored database schemas…
Attacks that exploit this kind of access
Lista instantáneas guardadas (sin el cuerpo completo del esquema). It is categorised as a Read tool in the Schema Engram MCP Server, which means it retrieves data without modifying state.
Register the Schema Engram MCP server in PolicyLayer and add a rule for db_schema_list: 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 Schema Engram. Nothing to install.
db_schema_list 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 db_schema_list 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 db_schema_list. 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.
db_schema_list is provided by the Schema Engram MCP server (wabox32/schema-mcp). 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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