AI agents call list_body_regions to retrieve information from MCPacer without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
With no description available, confidence is reduced. However, the naming pattern and context among sibling tools that are clearly Read operations (get_* and list_*) strongly suggest this retrieves body region data without modification. No evidence of side effects, data modification, execution, or financial impact.
From the tool's definition Tool named 'list_body_regions' with no description provided. Based on naming convention and sibling tools (get_activities, get_activity_by_id, get_activity_streams), this appears to be a data retrieval operation.
Documented attack patterns abuse exactly the kind of access list_body_regions gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCPacer, and nothing reaches the server without passing your rules. This is the rule we recommend for list_body_regions:
{
"version": "1",
"default": "deny",
"tools": {
"list_body_regions": {}
}
}list_body_regions is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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list_body_regions. It is categorised as a Read tool in the MCPacer MCP Server, which means it retrieves data without modifying state.
Register the MCPacer MCP server in PolicyLayer and add a rule for list_body_regions: 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 MCPacer. Nothing to install.
list_body_regions 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 list_body_regions 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 list_body_regions. 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.
list_body_regions is provided by the MCPacer MCP server (wernerpe/mcpacer). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from MCPacer, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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32 MCPacer tools catalogued and risk-classified — across an index of 43,000+ MCP servers.