AI agents call db_query to retrieve information from Onpe 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 database query tool operating on Peruvian electoral data. It retrieves and analyzes data without side effects. The explicit 'read-only' constraint in the description confirms this is a Read category tool. Severity is low because retrieval of public electoral data poses minimal risk even if misused by an AI agent.
From the tool's definition Description explicitly states 'read-only' (consulta analítica controlada read-only), which indicates data retrieval without modification. The tool name 'db_query' and emphasis on audit metadata and stable contract reinforce query-only functionality.
Attacks that exploit this kind of access
Consulta analítica controlada read-only con contrato estable y metadatos de auditoría. It is categorised as a Read tool in the Onpe MCP Server, which means it retrieves data without modifying state.
Register the Onpe MCP server in PolicyLayer and add a rule for db_query: 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 Onpe. Nothing to install.
db_query 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_query 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_query. 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_query is provided by the Onpe MCP server (oscarzamora/onpe-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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