AI agents call list to retrieve information from Ollama MCP Server 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 models in Ollama without creating, modifying, deleting, or executing any operations. It is a straightforward retrieval operation with no capability to change system state. The low severity reflects minimal blast radius even if misused by an AI agent—the worst outcome would be information disclosure about available models.
From the tool's definition Tool name 'list' with description 'List models' indicates a read-only operation that retrieves and displays available models without modification or side effects.
Documented attack patterns abuse exactly the kind of access list gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Ollama MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list:
{
"version": "1",
"default": "deny",
"tools": {
"list": {}
}
}list is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List models. It is categorised as a Read tool in the Ollama MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Ollama MCP Server MCP server in PolicyLayer and add a rule for list: 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 Ollama MCP Server. Nothing to install.
list 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 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. 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 is provided by the Ollama MCP Server MCP server (nighttrek/ollama-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 10 Ollama MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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10 Ollama MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.