Retrieve and return a list of all schema names from the connected Virtuoso database.
AI agents call virt_get_schemas to retrieve information from OpenLink MCP Server for ODBC without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves metadata (schema names) from a Virtuoso database with no side effects, data modification, code execution, or destructive capability. The blast radius is minimal: schema names are typically non-sensitive structural metadata, and even if an AI agent retrieves them, no harm occurs. This is a standard information retrieval operation.
From the tool's definition Tool description states 'Retrieve and return a list of all schema names' — a pure query operation with no modification or execution of commands. The verb 'Retrieve' and the read-only nature of listing schemas confirm this is a Read operation.
Attacks that exploit this kind of access
Retrieve and return a list of all schema names from the connected Virtuoso database. It is categorised as a Read tool in the OpenLink MCP Server for ODBC MCP Server, which means it retrieves data without modifying state.
Register the OpenLink MCP Server for ODBC MCP server in PolicyLayer and add a rule for virt_get_schemas: 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 OpenLink MCP Server for ODBC. Nothing to install.
virt_get_schemas 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 virt_get_schemas 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 virt_get_schemas. 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.
virt_get_schemas is provided by the OpenLink MCP Server for ODBC MCP server (pvsmark/pvs-odbc-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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