Get metadata about a note including tags, links, word count, and frontmatter.
AI agents call obsidian_get_note_metadata to retrieve information from Mcp Apple Obsidian without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs read-only operations: it queries and retrieves note metadata without creating, modifying, deleting, or executing anything. There are no side effects from calling this tool. The blast radius of misuse is minimal—an agent could only access metadata it is already authorized to view. This is a clear example of the Read category.
From the tool's definition obsidian_get_note_metadata retrieves metadata about a note including tags, links, word count, and frontmatter. The description uses only query/retrieval language with no indication of modification, deletion, or execution.
Attacks that exploit this kind of access
Get metadata about a note including tags, links, word count, and frontmatter. It is categorised as a Read tool in the Mcp Apple Obsidian MCP Server, which means it retrieves data without modifying state.
Register the Mcp Apple Obsidian MCP server in PolicyLayer and add a rule for obsidian_get_note_metadata: 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 Mcp Apple Obsidian. Nothing to install.
obsidian_get_note_metadata 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 obsidian_get_note_metadata 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 obsidian_get_note_metadata. 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.
obsidian_get_note_metadata is provided by the Mcp Apple Obsidian MCP server (rex/mcp-apple-obsidian). 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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