AI agents call rg_search_backlinks to retrieve information from Obsidian Vault Search for Claude without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Searching for backlinks (references pointing to a note) is a query operation that retrieves data from the vault without modifying, deleting, or executing anything. This is a classic Read category tool. Even though the tool description is empty, the contextual evidence from the server description and tool naming pattern makes it clear this performs vault queries only.
From the tool's definition Tool name 'rg_search_backlinks' combined with server description indicating it 'search[es] and analyze[s] Obsidian vault content' using ripgrep. No write, delete, or execute capabilities mentioned.
Documented attack patterns abuse exactly the kind of access rg_search_backlinks gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Obsidian Vault Search for Claude, and nothing reaches the server without passing your rules. This is the rule we recommend for rg_search_backlinks:
{
"version": "1",
"default": "deny",
"tools": {
"rg_search_backlinks": {}
}
}rg_search_backlinks is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
rg_search_backlinks. It is categorised as a Read tool in the Obsidian Vault Search for Claude MCP Server, which means it retrieves data without modifying state.
Register the Obsidian Vault Search for Claude MCP server in PolicyLayer and add a rule for rg_search_backlinks: 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 Obsidian Vault Search for Claude. Nothing to install.
rg_search_backlinks 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 rg_search_backlinks 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 rg_search_backlinks. 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.
rg_search_backlinks is provided by the Obsidian Vault Search for Claude MCP server (kpetrovsky/kp-ripgrep-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Obsidian Vault Search for Claude, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
5 Obsidian Vault Search for Claude tools catalogued and risk-classified — across an index of 43,000+ MCP servers.