get_tables_schema · Oracle MCP Server MCP: Risk & Policy

WHAT IT DOES

What get_tables_schema does on Oracle MCP Server

AI agents call get_tables_schema to retrieve information from Oracle MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

WHY IT NEEDS A POLICY

Why get_tables_schema needs a policy

Schema retrieval has no side effects and allows an AI to understand database structure without modifying data. The 'get_' prefix strongly suggests a read operation. Low severity due to limited blast radius: schema metadata alone cannot damage data or execute operations, though it provides reconnaissance value.

From the tool's definition Tool name 'get_tables_schema' indicates retrieval of schema metadata. Empty description, but sibling tools show this server has both read-only tools (get_database_vendor_info, get_dependent_objects, get_object_source, get_table_constraints, get_table_indexes)…

Attacks that exploit this kind of access

Questions about get_tables_schema

What does the get_tables_schema tool do? +

get_tables_schema. It is categorised as a Read tool in the Oracle MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_tables_schema? +

Register the Oracle MCP Server MCP server in PolicyLayer and add a rule for get_tables_schema: 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 MCP Server. Nothing to install.

What risk level is get_tables_schema? +

get_tables_schema is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_tables_schema? +

Yes. Add a rate_limit block to the get_tables_schema 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.

How do I block get_tables_schema completely? +

Set action: deny in the PolicyLayer policy for get_tables_schema. 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.

What MCP server provides get_tables_schema? +

get_tables_schema is provided by the Oracle MCP Server MCP server (zhengwanbo/oracle-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.