mysql_gr_primary

Identify the current primary member in a single-primary GR cluster.

SERVERMysql Mcp SOURCEoci:docker.io/writenotenow/mysql-mcp:v1.0.0

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-neverinfamous-mysql-mcp/mysql-gr-primary.md

WHAT IT DOES

What mysql_gr_primary does on Mysql Mcp

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

RISK

Why mysql_gr_primary is rated Low

This tool queries MySQL Group Replication (GR) cluster metadata to identify which member is primary. It performs a read-only lookup of cluster topology—no data is created, modified, deleted, or executed. The blast radius of misuse is minimal; an attacker learning the primary member name does not directly compromise data or systems.

From the tool's definition Tool name 'mysql_gr_primary' and description 'Identify the current primary member in a single-primary GR cluster' indicate a query operation that retrieves cluster state information without modification.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs mysql_gr_primary safely

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

mysql_gr_primary Allowed

mysql_gr_primary 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": {
    "mysql_gr_primary": {}
  }
}

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

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

FAQ

Questions about mysql_gr_primary

What does the mysql_gr_primary tool do? +

Identify the current primary member in a single-primary GR cluster. It is categorised as a Read tool in the Mysql Mcp MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on mysql_gr_primary? +

Register the Mysql MCP server in PolicyLayer and add a rule for mysql_gr_primary: 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 Mysql Mcp. Nothing to install.

What risk level is mysql_gr_primary? +

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

Can I rate-limit mysql_gr_primary? +

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

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

mysql_gr_primary is provided by the Mysql MCP server (oci:docker.io/writenotenow/mysql-mcp:v1.0.0). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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