AI agents call list_prompts to retrieve information from MCP Prompts Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or queries existing prompt data organized by category or by recency. It performs no data modification, deletion, execution, or financial operations. The 'list' operation is a standard read-only query with no blast radius if misused by an AI agent beyond potentially exposing prompt contents that may already be accessible.
From the tool's definition Tool name 'list_prompts' and description 'List prompts by category or get latest prompts' clearly indicate a retrieval operation with no side effects.
Documented attack patterns abuse exactly the kind of access list_prompts gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Prompts Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list_prompts:
{
"version": "1",
"default": "deny",
"tools": {
"list_prompts": {}
}
}list_prompts is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List prompts by category or get latest prompts. It is categorised as a Read tool in the MCP Prompts Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Prompts Server MCP server in PolicyLayer and add a rule for list_prompts: 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 MCP Prompts Server. Nothing to install.
list_prompts 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_prompts 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_prompts. 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_prompts is provided by the MCP Prompts Server MCP server (sparesparrow/mcp-prompts). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 51 MCP Prompts Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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51 MCP Prompts Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.