AI agents call list_providers to retrieve information from Sentinel without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns information about available AI providers and configuration state. It performs no modifications, deletions, code execution, or financial operations. The action is purely informational, making it a Read category risk with low severity.
From the tool's definition Tool name is 'list_providers' and description states 'List all available AI providers and the current default' — a retrieval operation with no side effects.
Attacks that exploit this kind of access
List all available AI providers and the current default. It is categorised as a Read tool in the Sentinel MCP Server, which means it retrieves data without modifying state.
Register the Sentinel MCP server in PolicyLayer and add a rule for list_providers: 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 Sentinel. Nothing to install.
list_providers 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_providers 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_providers. 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_providers is provided by the Sentinel MCP server (kal72/sentinel-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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