Calculate and analyze InnoDB buffer pool hit ratio and efficiency.
AI agents call mysql_buffer_pool_hit_ratio to retrieve information from Mysql without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and analyzes performance statistics from the MySQL buffer pool. It reads existing metrics to calculate efficiency ratios but does not create, modify, delete, or execute operations. The blast radius of misuse is minimal—an agent could only obtain performance information about the database, which is non-sensitive monitoring data. No data is at risk of loss, modification, or financial impact.
From the tool's definition Tool name and description indicate it 'calculates and analyzes' the InnoDB buffer pool hit ratio—a query of performance metrics with no modification of data or triggering of external operations.
Documented attack patterns abuse exactly the kind of access mysql_buffer_pool_hit_ratio gives an agent:
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_buffer_pool_hit_ratio:
{
"version": "1",
"default": "deny",
"tools": {
"mysql_buffer_pool_hit_ratio": {}
}
}mysql_buffer_pool_hit_ratio is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Calculate and analyze InnoDB buffer pool hit ratio and efficiency. It is categorised as a Read tool in the Mysql MCP Server, which means it retrieves data without modifying state.
Register the Mysql MCP server in PolicyLayer and add a rule for mysql_buffer_pool_hit_ratio: 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.
mysql_buffer_pool_hit_ratio is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the mysql_buffer_pool_hit_ratio 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.
Set action: deny in the PolicyLayer policy for mysql_buffer_pool_hit_ratio. 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.
mysql_buffer_pool_hit_ratio 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.
Start from Mysql, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
233 Mysql tools catalogued and risk-classified — across an index of 43,000+ MCP servers.