List all groups defined in the vault.
AI agents call vault_list_groups to retrieve information from Vault 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 retrieves a list of groups from the vault without creating, modifying, or deleting any data. It is a read-only operation analogous to a GET request. The sibling tools (vault_get_*, vault_advanced_search) confirm this server's focus on data retrieval. The blast radius of misuse is limited to information disclosure about group definitions.
From the tool's definition Tool name 'vault_list_groups' and description 'List all groups defined in the vault' indicate retrieval/query of existing data with no modification or side effects.
Attacks that exploit this kind of access
List all groups defined in the vault. It is categorised as a Read tool in the Vault MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Vault MCP Server MCP server in PolicyLayer and add a rule for vault_list_groups: 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 Vault MCP Server. Nothing to install.
vault_list_groups 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 vault_list_groups 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 vault_list_groups. 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.
vault_list_groups is provided by the Vault MCP Server MCP server (muhammadtaimur/vault-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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