gbrain_brain_stats
Get brain statistics: page count, chunk count, embedding coverage, etc.
This record as markdown: /tools/agent-store/gbrain-brain-stats.md
What gbrain_brain_stats does on Agent Store
AI agents call gbrain_brain_stats to retrieve information from Agent Store without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why gbrain_brain_stats is rated Low
This tool retrieves and queries statistical information about a brain's internal state (pages, chunks, embeddings). It performs no writes, deletes, executions, or financial operations. The action is purely informational with no side effects, fitting the 'Read' category with low severity.
From the tool's definition Tool name 'gbrain_brain_stats' and description 'Get brain statistics: page count, chunk count, embedding coverage, etc.' indicate retrieval of metadata/stats with no modification capability.
Attacks that exploit this kind of access
The rule that runs gbrain_brain_stats safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Agent Store, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For gbrain_brain_stats, this is the rule to start with:
gbrain_brain_stats is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Agent Store, apply this rule, and every gbrain_brain_stats call is checked against it from then on.
Questions about gbrain_brain_stats
Get brain statistics: page count, chunk count, embedding coverage, etc. It is categorised as a Read tool in the Agent Store MCP Server, which means it retrieves data without modifying state.
Register the Agent Store MCP server in PolicyLayer and add a rule for gbrain_brain_stats: 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 Agent Store. Nothing to install.
gbrain_brain_stats 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 gbrain_brain_stats 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 gbrain_brain_stats. 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.
gbrain_brain_stats is provided by the Agent Store MCP server (chrisluersen/agent-store). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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