execute-query · MSSQL MCP Server MCP: Risk & Policy

WHAT IT DOES

What execute-query does on MSSQL MCP Server

AI agents invoke execute-query to trigger actions in MSSQL MCP Server. 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 execute-query needs a policy

This tool runs code (SQL queries) whose effects depend on the query arguments provided. Although the server claims it supports only SELECT queries, the tool name 'execute-query' and description do not explicitly restrict query types, making it capable of executing CREATE, UPDATE, INSERT, DROP, or other operations.

From the tool's definition Tool description 'execute-query' and '執行 SQL 查詢語句' (Execute SQL query statement) enables execution of SQL queries against a database.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

execute-query Rate-limited

execute-query 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": {
    "execute-query": {
      "limits": [
        {
          "counter": "execute-query_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 MSSQL MCP Server, so you can run agents against it safely.

FAQ

Questions about execute-query

What does the execute-query tool do? +

執行 SQL 查詢語句. It is categorised as a Execute tool in the MSSQL MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on execute-query? +

Register the MSSQL MCP Server MCP server in PolicyLayer and add a rule for execute-query: 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 MCP Server. Nothing to install.

What risk level is execute-query? +

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

Can I rate-limit execute-query? +

Yes. Add a rate_limit block to the execute-query 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 execute-query completely? +

Set action: deny in the PolicyLayer policy for execute-query. 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 execute-query? +

execute-query is provided by the MSSQL MCP Server MCP server (nakiriyuuzu/mssql-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.