db_revoke_role_membership · Database MCP Server MCP

WHAT IT DOES

What db_revoke_role_membership does on Database MCP Server

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

WHY IT NEEDS A POLICY

Why db_revoke_role_membership needs a policy

Revoking role membership modifies access control by removing a role from a group/role, which is a reversible write operation (membership can be re-granted). However, it carries high severity because misuse by an AI agent could remove critical permissions from users or service accounts, potentially breaking application access or escalating/de-escalating privileges in unintended ways.

From the tool's definition Revoke role membership

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

db_revoke_role_membership Rate-limited

db_revoke_role_membership 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": {
    "db_revoke_role_membership": {
      "limits": [
        {
          "counter": "db_revoke_role_membership_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 Database MCP Server, so you can run agents against it safely.

FAQ

Questions about db_revoke_role_membership

What does the db_revoke_role_membership tool do? +

Revoke role membership. It is categorised as a Write tool in the Database 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 db_revoke_role_membership? +

Register the Database MCP Server MCP server in PolicyLayer and add a rule for db_revoke_role_membership: 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 Database MCP Server. Nothing to install.

What risk level is db_revoke_role_membership? +

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

Can I rate-limit db_revoke_role_membership? +

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

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

db_revoke_role_membership is provided by the Database MCP Server MCP server (roilanrodriguez55/database-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.