Execute a read-only SQL SELECT query against Oracle Database. Returns rows as a markdown table or JSON. Supports bind variables. Use for: SELECT, WITH queries. Max 10,000 rows.
AI agents call oracle_query to retrieve information from Oracle APEX MCP 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 via SELECT and WITH (CTE) queries without creating, modifying, deleting, or executing arbitrary code. The read-only constraint and explicit mention of SELECT-only usage confirm it fits the Read category. Severity is low because even if an LLM misuses this on sensitive data, the blast radius is limited to unauthorized data exposure rather than system modification or destruction.
From the tool's definition Tool name is 'oracle_query' and description states 'Execute a read-only SQL SELECT query' and 'Use for: SELECT, WITH queries'. The description explicitly constrains it to read-only operations with no side effects.
Attacks that exploit this kind of access
Execute a read-only SQL SELECT query against Oracle Database. Returns rows as a markdown table or JSON. Supports bind variables. Use for: SELECT, WITH queries. Max 10,000 rows. It is categorised as a Read tool in the Oracle APEX MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Oracle APEX MCP Server MCP server in PolicyLayer and add a rule for oracle_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 Oracle APEX MCP Server. Nothing to install.
oracle_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 oracle_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 oracle_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.
oracle_query is provided by the Oracle APEX MCP Server MCP server (silviosotelo/oracle-apex-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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