list_cursors

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/list-cursors.md

WHAT IT DOES

What list_cursors does on Mcpg

AI agents call list_cursors 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 list_cursors is rated Low

The tool name strongly suggests it retrieves metadata about active cursors without modifying state. Cursor listing is a diagnostic query operation with no side effects. Given it's part of a PostgreSQL MCP server focused on query analysis and monitoring (as evidenced by sibling tools like analyze_query_plan, analyze_lock_hotspots), this fits the Read category.

From the tool's definition Tool name 'list_cursors' indicates a query/listing operation that retrieves cursor information from PostgreSQL. The name follows the 'list_*' pattern which is characteristic of read-only operations.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_cursors 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 list_cursors, this is the rule to start with:

list_cursors Allowed

list_cursors 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": {
    "list_cursors": {}
  }
}

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 list_cursors call is checked against it from then on.

FAQ

Questions about list_cursors

What does the list_cursors tool do? +

list_cursors 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 list_cursors? +

Register the Mcpg MCP server in PolicyLayer and add a rule for list_cursors: 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 list_cursors? +

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

Can I rate-limit list_cursors? +

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

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

list_cursors 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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