25 tools. 12 can modify or destroy data without limits.
3 destructive tools with no built-in limits. Policy required.
Last updated:
Destructive tools (delete-note, obsidian_delete_file, remove-tags) permanently delete resources. There is no undo. An agent calling these in a retry loop causes irreversible damage.
Write operations (add-tags, create-directory, create-note) modify state. Without rate limits, an agent can make hundreds of changes in seconds — faster than any human can review or revert.
Intercept sits between your agent and Obsidian. Every tool call checked against your policy before it executes — so your agent can do its job without breaking things.
npx -y @policylayer/intercept scan -- npx -y @obsidian-mcp delete-note:
rules:
- action: deny Destructive tools should never be available to autonomous agents without human approval.
add-tags:
rules:
- rate_limit: 30/hour Prevents bulk unintended modifications from agents caught in loops.
list-available-vaults:
rules:
- rate_limit: 60/minute Controls API costs and prevents retry loops from exhausting upstream rate limits.
Yes. The Obsidian server exposes 3 destructive tools including delete-note, obsidian_delete_file, remove-tags. These permanently remove resources with no undo. Intercept blocks destructive tools by default so they never reach the upstream server.
The Obsidian server has 9 write tools including add-tags, create-directory, create-note. Set rate limits in your policy file -- for example, rate_limit: 10/hour prevents an agent from making more than 10 modifications per hour. Intercept enforces this at the transport layer.
25 tools across 3 categories: Destructive, Read, Write. 13 are read-only. 12 can modify, create, or delete data.
One line change. Instead of running the Obsidian server directly, prefix it with Intercept: intercept -c obsidian.yaml -- npx -y @obsidian-mcp. Download a pre-built policy from policylayer.com/policies/obsidian and adjust the limits to match your use case.
Starter policies available for each. Same risk classification, same one-command setup.
Set budgets, approvals, and hard limits across MCP servers.
npx -y @policylayer/intercept init