AI agents call get_metric_names to retrieve information from Optuna MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves metadata about metrics in an Optuna optimization study. It performs no modifications, deletions, or execution of external operations. It is purely informational, fitting the Read category for querying/listing data without side effects.
From the tool's definition Tool name 'get_metric_names' and description 'Get metric_names' indicate a retrieval operation. The verb 'get' and the read-only nature of querying metric names from an Optuna study confirm this is a data retrieval action with no side effects.
Documented attack patterns abuse exactly the kind of access get_metric_names gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Optuna MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_metric_names:
{
"version": "1",
"default": "deny",
"tools": {
"get_metric_names": {}
}
}get_metric_names is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get metric_names. It is categorised as a Read tool in the Optuna MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Optuna MCP Server MCP server in PolicyLayer and add a rule for get_metric_names: 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 Optuna MCP Server. Nothing to install.
get_metric_names 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 get_metric_names 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 get_metric_names. 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.
get_metric_names is provided by the Optuna MCP Server MCP server (optuna/optuna-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 26 Optuna MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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26 Optuna MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.