AI agents call dm8_list_tables to retrieve information from Mcp Dm8 without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves metadata (table names) from a database schema without creating, modifying, or deleting any data. It is a passive enumeration operation typical of Read category tools. Low severity due to limited blast radius—an AI agent could only discover table structure information, not access sensitive data directly or cause damage.
From the tool's definition Tool returns all table names under a specified schema ('返回指定 Schema 下的所有表名'). The server description explicitly states 'read-only query capabilities', and the tool name and description indicate listing/browsing functionality with no modification.
Documented attack patterns abuse exactly the kind of access dm8_list_tables gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Dm8, and nothing reaches the server without passing your rules. This is the rule we recommend for dm8_list_tables:
{
"version": "1",
"default": "deny",
"tools": {
"dm8_list_tables": {}
}
}dm8_list_tables is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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返回指定 Schema 下的所有表名. It is categorised as a Read tool in the Mcp Dm8 MCP Server, which means it retrieves data without modifying state.
Register the Mcp Dm8 MCP server in PolicyLayer and add a rule for dm8_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 Mcp Dm8. Nothing to install.
dm8_list_tables 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 dm8_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.
Set action: deny in the PolicyLayer policy for dm8_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.
dm8_list_tables is provided by the Mcp Dm8 MCP server (lianekai/mcp-dm8-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Mcp Dm8, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
3 Mcp Dm8 tools catalogued and risk-classified — across an index of 43,000+ MCP servers.