List KV secrets in HashiCorp Vault at the specified path
AI agents call vault_kv_list to retrieve information from HashiCorp 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 performs a read-only operation—listing secrets at a given path. It retrieves information but does not create, modify, delete, execute code, or move money. While listing secrets could theoretically reveal sensitive information if an agent lists paths it shouldn't access, the exposure depends on Vault's access control policies (authentication/authorization), not on the tool itself causing harm.
From the tool's definition Tool name is 'vault_kv_list' and description states 'List KV secrets in HashiCorp Vault at the specified path'. The verb 'list' indicates a query operation that retrieves metadata about secrets without modifying them.
Attacks that exploit this kind of access
List KV secrets in HashiCorp Vault at the specified path. It is categorised as a Read tool in the HashiCorp Vault MCP Server MCP Server, which means it retrieves data without modifying state.
Register the HashiCorp Vault MCP Server MCP server in PolicyLayer and add a rule for vault_kv_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 HashiCorp Vault MCP Server. Nothing to install.
vault_kv_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 vault_kv_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 vault_kv_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.
vault_kv_list is provided by the HashiCorp Vault MCP Server MCP server (rod-anami-kyndryl/hashi-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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