generate_schema_mermaid · MCP Database Server MCP

WHAT IT DOES

What generate_schema_mermaid does on MCP Database Server

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

WHY IT NEEDS A POLICY

Why generate_schema_mermaid needs a policy

An AI agent can call generate_schema_mermaid faster than any human can review — one bad instruction and it creates or modifies resources in MCP Database Server by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generate_schema_mermaid Rate-limited

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

FAQ

Questions about generate_schema_mermaid

What does the generate_schema_mermaid tool do? +

데이터베이스 스키마를 Mermaid ERD 다이어그램으로 생성합니다. It is categorised as a Write tool in the MCP Database 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 generate_schema_mermaid? +

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

What risk level is generate_schema_mermaid? +

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

Can I rate-limit generate_schema_mermaid? +

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

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

generate_schema_mermaid is provided by the MCP Database Server MCP server (zerogon1203/db-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.