获取数据库中的所有表
AI agents call listTables to retrieve information from SQL MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns database structure information (table names/metadata) without modifying, deleting, or executing arbitrary code. It is a straightforward metadata retrieval operation that fits the 'Read' category. The read-only constraint in the server description and the non-destructive nature of listing tables confirms low severity risk.
From the tool's definition Tool name 'listTables' combined with description stating it 'retrieves all tables in the database' (获取数据库中的所有表) and server description emphasizing 'read-only interaction' and 'database metadata exploration' indicates a metadata query operation with no side…
Attacks that exploit this kind of access
获取数据库中的所有表. It is categorised as a Read tool in the SQL MCP Server MCP Server, which means it retrieves data without modifying state.
Register the SQL MCP Server MCP server in PolicyLayer and add a rule for listTables: 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 SQL MCP Server. Nothing to install.
listTables 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 listTables 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 listTables. 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.
listTables is provided by the SQL MCP Server MCP server (polarisxb/sql-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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