Get the currently active file in Obsidian.
AI agents call get_active_file to retrieve information from Obsidian Modified 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 Obsidian to retrieve metadata about the currently active file. It performs no data creation, modification, deletion, code execution, or financial operations. The action is informational only, with negligible blast radius if misused by an agent—it simply returns which file is open.
From the tool's definition Tool name 'get_active_file' and description 'Get the currently active file in Obsidian' indicate pure retrieval with no modifications, side effects, or external operations.
Attacks that exploit this kind of access
Get the currently active file in Obsidian. It is categorised as a Read tool in the Obsidian Modified MCP Server, which means it retrieves data without modifying state.
Register the Obsidian Modified MCP server in PolicyLayer and add a rule for get_active_file: 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 Modified. Nothing to install.
get_active_file 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 get_active_file 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 get_active_file. 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.
get_active_file is provided by the Obsidian Modified MCP server (@marwansaab/obsidian-modified-mcp-server). 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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