commit_transaction · MSSQL MCP Server MCP: Risk & Policy

WHAT IT DOES

What commit_transaction does on MSSQL MCP Server

AI agents use commit_transaction to create or update resources in MSSQL MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MSSQL MCP Server environment.

WHY IT NEEDS A POLICY

Why commit_transaction needs a policy

Committing a transaction finalizes all pending write operations, making them irreversible once committed. While the act of committing is itself a Write operation (it persists data changes), the impact is high because it permanently applies all accumulated changes from the transaction — including potentially destructive SQL statements — to the database.

From the tool's definition Commit a transaction, making all changes permanent.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

commit_transaction Rate-limited

commit_transaction stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "commit_transaction": {
      "limits": [
        {
          "counter": "commit_transaction_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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 commit_transaction

What does the commit_transaction tool do? +

Commit a transaction, making all changes permanent. It is categorised as a Write tool in the MSSQL MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on commit_transaction? +

Register the MSSQL MCP Server MCP server in PolicyLayer and add a rule for commit_transaction: 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 commit_transaction? +

commit_transaction is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit commit_transaction? +

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

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

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