db_grant_all_tables_in_schema · Database MCP Server MCP

WHAT IT DOES

What db_grant_all_tables_in_schema does on Database MCP Server

AI agents use db_grant_all_tables_in_schema 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_grant_all_tables_in_schema needs a policy

Granting privileges is a Write action—it modifies role permissions on database objects in a reversible manner. While permission changes are sensitive, they are not destructive (can be revoked), not execution of arbitrary code, and not financial.

From the tool's definition Tool name 'db_grant_all_tables_in_schema' and description 'Grant privileges on all tables in a schema to a role' indicate modifying database access controls and permissions, which is a reversible write operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

db_grant_all_tables_in_schema Rate-limited

db_grant_all_tables_in_schema 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_grant_all_tables_in_schema": {
      "limits": [
        {
          "counter": "db_grant_all_tables_in_schema_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_grant_all_tables_in_schema

What does the db_grant_all_tables_in_schema tool do? +

Grant privileges on all tables in a schema to 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_grant_all_tables_in_schema? +

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

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

Can I rate-limit db_grant_all_tables_in_schema? +

Yes. Add a rate_limit block to the db_grant_all_tables_in_schema 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_grant_all_tables_in_schema completely? +

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

db_grant_all_tables_in_schema 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.