This record as markdown: /tools/io-github-0nork-0nmcp/vault-unseal.md
What vault_unseal does on 0nmcp
AI agents invoke vault_unseal to trigger actions in 0nmcp. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
Why vault_unseal is rated High
Unsealing a vault decrypts and restores access to a previously sealed/locked service. This is an operational action that triggers an external operation (enabling access to secrets/credentials), which could have significant security implications if misused. It's not purely Read (it changes state), not Write (it doesn't create/modify data), but Execute best fits triggering an external operational change.
From the tool's definition vault_unseal / 'Decrypt a service'
Attacks that exploit this kind of access
The rule that runs vault_unseal safely
PolicyLayer is an MCP gateway: it sits between your AI agents and 0nmcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For vault_unseal, this is the rule to start with:
vault_unseal stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect 0nmcp, apply this rule, and every vault_unseal call is checked against it from then on.
Questions about vault_unseal
Decrypt a service. It is categorised as a Execute tool in the 0nmcp MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the 0n MCP server in PolicyLayer and add a rule for vault_unseal: 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 0nmcp. Nothing to install.
vault_unseal is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the vault_unseal 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_unseal. 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_unseal is provided by the 0n MCP server (0nmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
More on 0n, and thousands of servers like it.
This server
Across the catalogue