generate_schema_diagram

A read tool on the Mcpg MCP server.

SERVERMcpg SOURCEpypi:mcpg

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-devopam-mcpg/generate-schema-diagram.md

WHAT IT DOES

What generate_schema_diagram does on Mcpg

AI agents call generate_schema_diagram to retrieve information from Mcpg without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why generate_schema_diagram is rated Low

A schema diagram generator typically reads database schema metadata (tables, columns, relationships) and produces a visual or textual representation. No side effects are expected. However, confidence is reduced due to the empty description. Given the Read-heavy sibling tools (analyze_*, add_*), this fits best as a Read operation with low severity.

From the tool's definition Tool name 'generate_schema_diagram' and server context (PostgreSQL MCP server); description is empty and uninformative.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs generate_schema_diagram safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Mcpg, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For generate_schema_diagram, this is the rule to start with:

generate_schema_diagram Allowed

generate_schema_diagram is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "generate_schema_diagram": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Mcpg, apply this rule, and every generate_schema_diagram call is checked against it from then on.

FAQ

Questions about generate_schema_diagram

What does the generate_schema_diagram tool do? +

generate_schema_diagram is a read tool on the Mcpg MCP server. It is categorised as a Read tool in the Mcpg MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on generate_schema_diagram? +

Register the Mcpg MCP server in PolicyLayer and add a rule for generate_schema_diagram: 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 Mcpg. Nothing to install.

What risk level is generate_schema_diagram? +

generate_schema_diagram is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit generate_schema_diagram? +

Yes. Add a rate_limit block to the generate_schema_diagram 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_diagram completely? +

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

generate_schema_diagram is provided by the Mcpg MCP server (pypi:mcpg). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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