List repository tags.
AI agents call list_tags to retrieve information from GitLab MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only queries and returns tag information from a repository. It performs no creation, modification, deletion, or execution of code/commands. The action is read-only and has no blast radius if misused by an AI agent—the worst case is exposure of existing repository tag information that is typically already visible to authorized users.
From the tool's definition Tool name 'list_tags' and description 'List repository tags' indicate a retrieval operation with no side effects. Tags are metadata about repository commits and do not modify any state.
Attacks that exploit this kind of access
List repository tags. It is categorised as a Read tool in the GitLab MCP MCP Server, which means it retrieves data without modifying state.
Register the GitLab MCP server in PolicyLayer and add a rule for list_tags: 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 MCP. Nothing to install.
list_tags 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_tags 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_tags. 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_tags is provided by the GitLab MCP server (shahabmosavi/gitlab_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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