Search for content in the Obsidian vault
AI agents call search_vault to retrieve information from Enhanced Obsidian 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 search operation, which is a read-only action that queries the vault's contents and returns results. It has no side effects—it does not create, modify, delete, or execute operations. The blast radius is minimal as misuse would only expose information the user already has access to within their own vault.
From the tool's definition Tool name 'search_vault' and description 'Search for content in the Obsidian vault' indicate a query operation that retrieves data without modifying state.
Documented attack patterns abuse exactly the kind of access search_vault gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Enhanced Obsidian MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for search_vault:
{
"version": "1",
"default": "deny",
"tools": {
"search_vault": {}
}
} search_vault is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Search for content in the Obsidian vault. It is categorised as a Read tool in the Enhanced Obsidian MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Enhanced Obsidian MCP Server MCP server in PolicyLayer and add a rule for search_vault: 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 Enhanced Obsidian MCP Server. Nothing to install.
search_vault 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 search_vault 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 search_vault. 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.
search_vault is provided by the Enhanced Obsidian MCP Server MCP server (jianruidutong/obsidian-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Enhanced Obsidian MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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25 Enhanced Obsidian MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.