secret-engine-retrieve-option
AI agents call secret-engine-retrieve-option to retrieve information from Vault MCP Server (mschuchard) without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
'Retrieve' and 'read' operations on Vault secret engines are non-destructive queries that access configuration or metadata without side effects. While the empty description reduces confidence slightly, the naming convention and context (Vault administration) strongly suggest this tool queries secret engine options/settings rather than modifying, deleting, or executing operations.
From the tool's definition Tool name 'secret-engine-retrieve-option' contains 'retrieve' which indicates data retrieval without modification.
Attacks that exploit this kind of access
secret-engine-retrieve-option. It is categorised as a Read tool in the Vault MCP Server (mschuchard) MCP Server, which means it retrieves data without modifying state.
Register the Vault MCP Server (mschuchard) MCP server in PolicyLayer and add a rule for secret-engine-retrieve-option: 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 (mschuchard). Nothing to install.
secret-engine-retrieve-option 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 secret-engine-retrieve-option 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 secret-engine-retrieve-option. 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.
secret-engine-retrieve-option is provided by the Vault MCP Server (mschuchard) MCP server (mschuchard/vault-mcp-server). 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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