Get the currently open note in Obsidian
AI agents call active_note to retrieve information from Connect MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries the state of the Obsidian editor to return metadata about the currently active note. It performs a read-only operation with no capability to modify, delete, or execute code. The blast radius of misuse is minimal: an AI agent learning which note is open poses no security risk. Classified as Read with low severity.
From the tool's definition Tool name is 'active_note' and description states 'Get the currently open note in Obsidian' — a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
Get the currently open note in Obsidian. It is categorised as a Read tool in the Connect MCP MCP Server, which means it retrieves data without modifying state.
Register the Connect MCP server in PolicyLayer and add a rule for active_note: 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 Connect MCP. Nothing to install.
active_note 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 active_note 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 active_note. 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.
active_note is provided by the Connect MCP server (joch/obsidian-connect-mcp). 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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