mysql_index_usage_effectiveness

THE RISK

Low Risk

Why mysql_index_usage_effectiveness needs a policy

This tool retrieves and analyzes existing database metadata about index usage patterns. It reads performance statistics to provide insights but does not create, modify, delete, or execute code. The server description emphasizes 'read-only queries' and 'performance analysis,' confirming the read-only nature. No side effects or irreversible changes occur from querying index statistics.

From the tool's definition Tool name contains 'analyze' and description states 'Analyze index usage effectiveness and identify unused indexes' - performs information gathering and reporting without modifying data or executing arbitrary queries.

Documented attack patterns abuse exactly the kind of access mysql_index_usage_effectiveness gives an agent:

POLICY

How to control mysql_index_usage_effectiveness

PolicyLayer is an MCP gateway — it sits between your AI agents and Mysql, and nothing reaches the server without passing your rules. This is the rule we recommend for mysql_index_usage_effectiveness:

policy.json

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

mysql_index_usage_effectiveness is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Mysql — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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All 233 Mysql tools →

Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about mysql_index_usage_effectiveness

What does the mysql_index_usage_effectiveness tool do? +

Analyze index usage effectiveness and identify unused indexes. It is categorised as a Read tool in the Mysql MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on mysql_index_usage_effectiveness? +

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

What risk level is mysql_index_usage_effectiveness? +

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

Can I rate-limit mysql_index_usage_effectiveness? +

Yes. Add a rate_limit block to the mysql_index_usage_effectiveness 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_index_usage_effectiveness completely? +

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

mysql_index_usage_effectiveness is provided by the Mysql MCP server (mukul975/mysql-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Mysql tool call.

Start from Mysql, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →