Report the state of Bob's local memory. Use this first if you don't know
AI agents call bob_health to retrieve information from Brain without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool reads and reports the health/state of a cognitive prosthetic system's memory. It has no side effects, does not execute code or commands, and does not create, modify, or delete data. It is purely informational, making it a Read category risk with low severity—an agent misusing it would at worst retrieve stale or irrelevant state information.
From the tool's definition Tool name 'bob_health' and description 'Report the state of Bob's local memory' indicate a query/reporting function that retrieves status information without modification or execution of external operations.
Documented attack patterns abuse exactly the kind of access bob_health gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Brain, and nothing reaches the server without passing your rules. This is the rule we recommend for bob_health:
{
"version": "1",
"default": "deny",
"tools": {
"bob_health": {}
}
}bob_health is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Report the state of Bob's local memory. Use this first if you don't know. It is categorised as a Read tool in the Brain MCP Server, which means it retrieves data without modifying state.
Register the Brain MCP server in PolicyLayer and add a rule for bob_health: 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 Brain. Nothing to install.
bob_health 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 bob_health 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 bob_health. 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.
bob_health is provided by the Brain MCP server (mordechaipotash/brain-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Brain, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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34 Brain tools catalogued and risk-classified — across an index of 43,000+ MCP servers.