kdb_list_tables · KDB MCP Service MCP: Risk & Policy

WHAT IT DOES

What kdb_list_tables does on KDB MCP Service

AI agents call kdb_list_tables to retrieve information from KDB MCP Service 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 kdb_list_tables needs a policy

This tool retrieves schema metadata (table names) from a KDB+ database without modifying, executing, or deleting any data. It is a read-only operation that discovers available tables, similar to schema introspection. The low severity reflects minimal blast radius—an agent misusing this tool could only enumerate tables, not compromise data integrity or trigger destructive operations.

From the tool's definition Tool name 'kdb_list_tables' and description 'List all tables in a KDB+ database' indicate a query/introspection operation with no side effects.

Attacks that exploit this kind of access

Questions about kdb_list_tables

What does the kdb_list_tables tool do? +

List all tables in a KDB+ database. It is categorised as a Read tool in the KDB MCP Service MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on kdb_list_tables? +

Register the KDB MCP Service MCP server in PolicyLayer and add a rule for kdb_list_tables: 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 KDB MCP Service. Nothing to install.

What risk level is kdb_list_tables? +

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

Can I rate-limit kdb_list_tables? +

Yes. Add a rate_limit block to the kdb_list_tables 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 kdb_list_tables completely? +

Set action: deny in the PolicyLayer policy for kdb_list_tables. 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 kdb_list_tables? +

kdb_list_tables is provided by the KDB MCP Service MCP server (riteshsonawala/kdb-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.