Analyze which tags frequently appear together
AI agents call analyze_tag_cooccurrence to retrieve information from jrnl MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Analyzing tag cooccurrence patterns is a retrieval and analytical operation that derives insights from existing journal data. It has no side effects, does not modify or delete data, and does not execute code or trigger external operations. It falls squarely within the 'Read' category as a data analysis/query tool with minimal security risk.
From the tool's definition The tool 'analyze_tag_cooccurrence' analyzes which tags frequently appear together in journal entries. This is a read-only operation that examines existing data without modifying, deleting, or executing external operations.
Attacks that exploit this kind of access
Analyze which tags frequently appear together. It is categorised as a Read tool in the jrnl MCP Server MCP Server, which means it retrieves data without modifying state.
Register the jrnl MCP Server MCP server in PolicyLayer and add a rule for analyze_tag_cooccurrence: 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 jrnl MCP Server. Nothing to install.
analyze_tag_cooccurrence 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 analyze_tag_cooccurrence 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 analyze_tag_cooccurrence. 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.
analyze_tag_cooccurrence is provided by the jrnl MCP Server MCP server (yostos/jrnl-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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