List label names in a Prometheus datasource. Allows filtering by series selectors and time range.
AI agents call list_prometheus_label_names to retrieve information from Mcp Grafana 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 Prometheus label names from a datasource. It is a query operation that returns information without modifying any state. The filtering parameters (series selectors, time range) are query inputs, not modification operations. No data is created, modified, deleted, or financial transactions occur. This is a straightforward Read category tool with low severity risk.
From the tool's definition Tool name is 'list_prometheus_label_names' and description states it 'List label names in a Prometheus datasource.' The verb 'list' and the passive action of retrieving/querying label names indicate a read-only operation with no data modification, creation,…
Attacks that exploit this kind of access
List label names in a Prometheus datasource. Allows filtering by series selectors and time range. It is categorised as a Read tool in the Mcp Grafana MCP Server, which means it retrieves data without modifying state.
Register the Mcp Grafana MCP server in PolicyLayer and add a rule for list_prometheus_label_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 Mcp Grafana. Nothing to install.
list_prometheus_label_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 list_prometheus_label_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 list_prometheus_label_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.
list_prometheus_label_names is provided by the Mcp Grafana MCP server (@leval/mcp-grafana). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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