Get the execution plan for a SQL query.
AI agents call explain_query to retrieve information from Oracle DB MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves and displays query execution plan information, which is a read-only operation with no side effects. It does not execute the query, modify data, delete records, or trigger external operations. The execution plan is diagnostic metadata used for performance analysis.
From the tool's definition Tool name 'explain_query' and description 'Get the execution plan for a SQL query' indicate retrieval of query metadata without modification or execution of the query itself. Execution plans are read-only diagnostic information.
Attacks that exploit this kind of access
Get the execution plan for a SQL query. It is categorised as a Read tool in the Oracle DB MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Oracle DB MCP Server MCP server in PolicyLayer and add a rule for explain_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 DB MCP Server. Nothing to install.
explain_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 explain_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 explain_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.
explain_query is provided by the Oracle DB MCP Server MCP server (titan213/oracle-db-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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