List top-level notes for an MR.
AI agents call gitlab_list_merge_request_notes to retrieve information from Gitlab without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries existing notes attached to a merge request. It has no side effects, does not execute code, does not modify or delete data, and does not move money. It is a straightforward data retrieval operation, the lowest-risk category.
From the tool's definition Tool name uses 'list' verb and description states 'List top-level notes for an MR' — a pure retrieval operation with no modification, deletion, or execution capability.
Documented attack patterns abuse exactly the kind of access gitlab_list_merge_request_notes gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Gitlab, and nothing reaches the server without passing your rules. This is the rule we recommend for gitlab_list_merge_request_notes:
{
"version": "1",
"default": "deny",
"tools": {
"gitlab_list_merge_request_notes": {}
}
}gitlab_list_merge_request_notes is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List top-level notes for an MR. It is categorised as a Read tool in the Gitlab MCP Server, which means it retrieves data without modifying state.
Register the Gitlab MCP server in PolicyLayer and add a rule for gitlab_list_merge_request_notes: 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 Gitlab. Nothing to install.
gitlab_list_merge_request_notes 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 gitlab_list_merge_request_notes 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 gitlab_list_merge_request_notes. 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.
gitlab_list_merge_request_notes is provided by the Gitlab MCP server (mcpland/gitlab-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Gitlab, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
190 Gitlab tools catalogued and risk-classified — across an index of 43,000+ MCP servers.