db_revoke_table · Database MCP Server MCP: Risk & Policy

WHAT IT DOES

What db_revoke_table does on Database MCP Server

AI agents use db_revoke_table 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_table needs a policy

Revoking privileges modifies access control settings on database tables. This is a write/modification operation on permissions metadata. While it doesn't delete data, it can immediately cut off a role's access to tables, potentially breaking applications or workflows.

From the tool's definition Revoke table privileges from a role

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

db_revoke_table Rate-limited

db_revoke_table 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_table": {
      "limits": [
        {
          "counter": "db_revoke_table_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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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_table

What does the db_revoke_table tool do? +

Revoke table privileges from a role. 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_table? +

Register the Database MCP Server MCP server in PolicyLayer and add a rule for db_revoke_table: 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_table? +

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

Can I rate-limit db_revoke_table? +

Yes. Add a rate_limit block to the db_revoke_table 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_table completely? +

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

db_revoke_table 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.