Execute a SELECT SQL query and return results
AI agents call query to retrieve information from Mcp Database without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
SELECT queries have no side effects; they only retrieve existing data. The server explicitly supports 'configurable read-only security,' and this tool is limited to SELECT (not UPDATE, DELETE, or DROP). Severity is low because read operations alone pose minimal blast radius unless they expose sensitive data, but that is a data sensitivity issue rather than a capability risk from the tool itself.
From the tool's definition Tool name 'query' with description 'Execute a SELECT SQL query and return results' — SELECT is explicitly a read-only operation that retrieves data without modification.
Attacks that exploit this kind of access
Execute a SELECT SQL query and return results. It is categorised as a Read tool in the Mcp Database MCP Server, which means it retrieves data without modifying state.
Register the Mcp Database MCP server in PolicyLayer and add a rule for 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 Mcp Database. Nothing to install.
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 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 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.
query is provided by the Mcp Database MCP server (nam088/mcp-database-server). 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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