Use this when you want a high-level health check of the running app's state management. Returns active stores, error-prone stores, unused stores, and activity patterns. Example: {} or {windowMs: 60000, compact: true}.
AI agents call nanostores_runtime_overview to retrieve information from Nanostores MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
compact | boolean | — | Return TOON-encoded compact table for lower token cost |
windowMs | number | — | Time window in milliseconds (from now back) |
Parameters from the server's own tool schema.
This tool performs runtime introspection and diagnostics on Nanostores state management. It queries application state without modifying, deleting, or executing arbitrary code. The optional parameters (windowMs, compact) are configuration flags for the read operation itself, not execution triggers.
From the tool's definition Tool returns monitoring data: 'active stores, error-prone stores, unused stores, and activity patterns.' Keywords 'Returns' and 'health check' indicate read-only observational operations with no modifications or side effects.
Attacks that exploit this kind of access
Use this when you want a high-level health check of the running app's state management. Returns active stores, error-prone stores, unused stores, and activity patterns. Example: {} or {windowMs: 60000, compact: true}. It is categorised as a Read tool in the Nanostores MCP MCP Server, which means it retrieves data without modifying state.
nanostores_runtime_overview accepts 2 parameters: compact, windowMs. The full parameter table on this page comes from the server's own tool schema.
Register the Nanostores MCP server in PolicyLayer and add a rule for nanostores_runtime_overview: 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 Nanostores MCP. Nothing to install.
nanostores_runtime_overview 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 nanostores_runtime_overview 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 nanostores_runtime_overview. 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.
nanostores_runtime_overview is provided by the Nanostores MCP server (nanostores-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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