List all accessible databases on the server.
AI agents call mssql_list_databases to retrieve information from MSSQL Database MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a simple enumeration of database names, which is a non-destructive query operation with no side effects. While it reveals information about the database infrastructure, the blast radius of misuse is minimal—an agent could only discover what databases exist, not access their contents without further tool invocation. This is a standard Read category operation.
From the tool's definition Tool name 'mssql_list_databases' and description 'List all accessible databases on the server' indicate a read-only operation that retrieves metadata without modifying, executing, or deleting anything.
Attacks that exploit this kind of access
List all accessible databases on the server. It is categorised as a Read tool in the MSSQL Database MCP Server MCP Server, which means it retrieves data without modifying state.
Register the MSSQL Database MCP Server MCP server in PolicyLayer and add a rule for mssql_list_databases: 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 MSSQL Database MCP Server. Nothing to install.
mssql_list_databases 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 mssql_list_databases 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 mssql_list_databases. 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.
mssql_list_databases is provided by the MSSQL Database MCP Server MCP server (vpro1032/mssql-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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