disconnect · Oracle DB MCP Server MCP: Risk & Policy

WHAT IT DOES

What disconnect does on Oracle DB MCP Server

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

WHY IT NEEDS A POLICY

Why disconnect needs a policy

Disconnecting a database connection is a connection management operation that alters session state reversibly. It does not delete data, execute queries, or trigger external operations. It ranks above Read because it modifies system state, but is less severe than Execute or Destructive because the primary data and logic remain unaffected.

From the tool's definition The tool closes ('disconnects') a connection to an Oracle database. Closing a connection modifies the state of the connection pool and active sessions, which is a reversible state change.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

disconnect Rate-limited

disconnect 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": {
    "disconnect": {
      "limits": [
        {
          "counter": "disconnect_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 Oracle DB MCP Server, so you can run agents against it safely.

FAQ

Questions about disconnect

What does the disconnect tool do? +

Close a connection to a named Oracle database. It is categorised as a Write tool in the Oracle DB 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 disconnect? +

Register the Oracle DB MCP Server MCP server in PolicyLayer and add a rule for disconnect: 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 Oracle DB MCP Server. Nothing to install.

What risk level is disconnect? +

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

Can I rate-limit disconnect? +

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

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

disconnect is provided by the Oracle DB MCP Server MCP server (titan213/oracle-db-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.