Get all values for a specific label in a Loki datasource
AI agents call get_loki_label_values to retrieve information from Grafana MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves label values from a Loki datasource. It performs a read-only operation that returns data without creating, modifying, deleting, or executing any changes. The operation is informational in nature, used for exploration and understanding available log labels. There is minimal risk even if misused, as it cannot modify state or trigger external actions.
From the tool's definition Tool name 'get_loki_label_values' and description 'Get all values for a specific label in a Loki datasource' indicate a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
Get all values for a specific label in a Loki datasource. It is categorised as a Read tool in the Grafana MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Grafana MCP Server MCP server in PolicyLayer and add a rule for get_loki_label_values: 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 Grafana MCP Server. Nothing to install.
get_loki_label_values 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_loki_label_values 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_loki_label_values. 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_loki_label_values is provided by the Grafana MCP Server MCP server (quanticsoul4772/grafana-mcp). 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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