Run a Loki range query through Grafana's Loki datasource proxy.
AI agents call query_loki 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 log data from Loki (a log aggregation system) via Grafana's proxy. It performs a read-only query operation with no capability to modify, delete, or execute code. The server description explicitly emphasizes 'read-only diagnostics', and querying logs is a classic Read category operation. Even if the query is complex, it cannot create side effects or alter data.
From the tool's definition Tool description states 'Run a Loki range query through Grafana's Loki datasource proxy' and server is explicitly 'read-only diagnostics' enabling 'log queries'. The verb 'query' and context of log retrieval indicate data retrieval with no side effects.
Attacks that exploit this kind of access
Run a Loki range query through Grafana's Loki datasource proxy. 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 query_loki: 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.
query_loki 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 query_loki 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 query_loki. 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.
query_loki is provided by the Mcp Grafana MCP server (romaine-life/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.
Teams ship this data inside their own products. See what a licence covers →