query_dameng · Dameng MCP: Risk & Policy

WHAT IT DOES

What query_dameng does on Dameng

AI agents invoke query_dameng to trigger actions in Dameng. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why query_dameng needs a policy

The tool executes arbitrary SQL including DML statements (INSERT, UPDATE, DELETE), which can modify or destroy data. Since it supports both read queries and data-manipulation statements, it spans Read through potentially Destructive categories. The most severe applicable category is Execute (DML can modify data reversibly or irreversibly depending on the statement).

From the tool's definition 执行达梦数据库 SQL 查询（SELECT/DML），返回结构化结果 — explicitly supports DML (INSERT/UPDATE/DELETE) in addition to SELECT

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

query_dameng Rate-limited

query_dameng stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "query_dameng": {
      "limits": [
        {
          "counter": "query_dameng_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Dameng, so you can run agents against it safely.

FAQ

Questions about query_dameng

What does the query_dameng tool do? +

执行达梦数据库 SQL 查询（SELECT/DML），返回结构化结果. It is categorised as a Execute tool in the Dameng MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on query_dameng? +

Register the Dameng MCP server in PolicyLayer and add a rule for query_dameng: 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 Dameng. Nothing to install.

What risk level is query_dameng? +

query_dameng is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit query_dameng? +

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

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

query_dameng is provided by the Dameng MCP server (springdamon/mcp-server-dameng). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.