mysql_cross_database_fk_analysis

THE RISK

Low Risk

Why mysql_cross_database_fk_analysis needs a policy

This tool retrieves and analyzes metadata about foreign key constraints across databases. It performs read-only introspection with no side effects. While the server description claims 'read-only queries,' the broader tool set includes destructive actions (drop_event) and state-changing operations (create_user_with_ssl, alter_event), confirming this server does expose write/execute/destructive capabilities elsewhere.

From the tool's definition Tool name includes 'analysis' and description states 'Analyze foreign key issues across databases' – purely observational/diagnostic function with no modification of data or execution of external operations.

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

POLICY

How to control mysql_cross_database_fk_analysis

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_cross_database_fk_analysis:

policy.json

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

mysql_cross_database_fk_analysis 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

More Mysql tools

Destructive drop_event Drop a scheduled event. Destructive drop_partition Drop a partition from a table. Destructive drop_role Drop a role (MySQL 8.0+). Destructive drop_stored_function Drop a stored function. Destructive drop_stored_procedure Drop a stored procedure. Destructive mysql_delete_data Delete data from a table. Destructive mysql_drop_database Drop a MySQL database (USE WITH CAUTION!). Destructive mysql_drop_foreign_key Drop a foreign key constraint from a table.

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_cross_database_fk_analysis

What does the mysql_cross_database_fk_analysis tool do? +

Analyze foreign key issues across databases. 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_cross_database_fk_analysis? +

Register the Mysql MCP server in PolicyLayer and add a rule for mysql_cross_database_fk_analysis: 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_cross_database_fk_analysis? +

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

Can I rate-limit mysql_cross_database_fk_analysis? +

Yes. Add a rate_limit block to the mysql_cross_database_fk_analysis 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_cross_database_fk_analysis completely? +

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

mysql_cross_database_fk_analysis 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 →