AI agents call get_dev_logs to retrieve information from Npm Dev without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries existing log data from development server processes. It performs no modifications, deletions, executions, or financial operations. Log retrieval is a read-only operation with minimal risk; the worst case is exposure of log contents which may contain sensitive information but does not alter system state.
From the tool's definition Tool name 'get_dev_logs' and description 'npm run devのログ取得' (retrieves logs from npm run dev) indicate data retrieval without modification or side effects.
Attacks that exploit this kind of access
npm run devのログ取得. It is categorised as a Read tool in the Npm Dev MCP Server, which means it retrieves data without modifying state.
Register the Npm Dev MCP server in PolicyLayer and add a rule for get_dev_logs: 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 Npm Dev. Nothing to install.
get_dev_logs 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_dev_logs 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_dev_logs. 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_dev_logs is provided by the Npm Dev MCP server (masamunet/npm-dev-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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