Show recurring themes and topics from recent memory logs without exposing diary content.
AI agents call show_themes to retrieve information from Obsidian Diary MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays analytical summaries (themes and topics) derived from diary entries. It explicitly states it does not expose the actual diary content, making it a read-only, low-impact operation. The worst-case misuse would be minor privacy leakage of high-level topic patterns, but no data is modified or created.
From the tool's definition Show recurring themes and topics from recent memory logs without exposing diary content
Attacks that exploit this kind of access
Show recurring themes and topics from recent memory logs without exposing diary content. It is categorised as a Read tool in the Obsidian Diary MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Obsidian Diary MCP Server MCP server in PolicyLayer and add a rule for show_themes: 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 Diary MCP Server. Nothing to install.
show_themes 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 show_themes 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 show_themes. 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.
show_themes is provided by the Obsidian Diary MCP Server MCP server (madebygps/obsidian-diary-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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