AI agents call fabric_list_capacities to retrieve information from Fabric-Analytics-MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a straightforward enumeration/listing operation that queries and returns data about Fabric capacities. It has no side effects, does not execute code, and does not modify any state. The blast radius of misuse is minimal—an agent could enumerate capacities but could not perform destructive or financial operations with this tool alone.
From the tool's definition The tool name 'list_capacities' and description 'List all available Fabric capacities' indicate a read-only operation that retrieves information about existing capacities without modifying or executing anything.
Documented attack patterns abuse exactly the kind of access fabric_list_capacities gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Fabric-Analytics-MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for fabric_list_capacities:
{
"version": "1",
"default": "deny",
"tools": {
"fabric_list_capacities": {}
}
}fabric_list_capacities is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all available Fabric capacities. It is categorised as a Read tool in the Fabric-Analytics-MCP MCP Server, which means it retrieves data without modifying state.
Register the Fabric-Analytics- MCP server in PolicyLayer and add a rule for fabric_list_capacities: 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 Fabric-Analytics-MCP. Nothing to install.
fabric_list_capacities 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 fabric_list_capacities 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 fabric_list_capacities. 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.
fabric_list_capacities is provided by the Fabric-Analytics- MCP server (santhoshravindran7/fabric-analytics-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 83 Fabric-Analytics-MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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83 Fabric-Analytics-MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.