Run a SELECT query on the demo employee SQLite database. Only SELECT is allowed.
AI agents call query_database to retrieve information from MCP Tool Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves data from a SQLite database using SELECT queries only. The explicit restriction to SELECT queries means it cannot modify, delete, or execute arbitrary code. It is a pure data retrieval operation with no side effects, fitting the Read category.
From the tool's definition Tool description states 'Run a SELECT query' and 'Only SELECT is allowed', explicitly restricting to read-only operations with no write, delete, or destructive permissions.
Attacks that exploit this kind of access
Run a SELECT query on the demo employee SQLite database. Only SELECT is allowed. It is categorised as a Read tool in the MCP Tool Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Tool Server MCP server in PolicyLayer and add a rule for query_database: 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 Tool Server. Nothing to install.
query_database 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_database 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_database. 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_database is provided by the MCP Tool Server MCP server (rakeshpvconnect-ops/per-mcp-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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