cache_entry · LiveJournal MCP Server MCP: Risk & Policy

WHAT IT DOES

What cache_entry does on LiveJournal MCP Server

AI agents use cache_entry to create or update resources in LiveJournal MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your LiveJournal MCP Server environment.

WHY IT NEEDS A POLICY

Why cache_entry needs a policy

This tool retrieves a LiveJournal entry and writes it to a local SQLite database for offline access. While it modifies data, the modification is limited to local caching—a reversible, non-destructive operation that does not affect production systems or user-facing data.

From the tool's definition The tool description states 'save it to the local SQLite cache', which modifies local cached data. The name 'cache_entry' and action of writing to a SQLite database confirm data creation/modification.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

cache_entry Rate-limited

cache_entry stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "cache_entry": {
      "limits": [
        {
          "counter": "cache_entry_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches LiveJournal MCP Server, so you can run agents against it safely.

FAQ

Questions about cache_entry

What does the cache_entry tool do? +

Fetch one LiveJournal entry by itemid and save it to the local SQLite cache. It is categorised as a Write tool in the LiveJournal MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on cache_entry? +

Register the LiveJournal MCP Server MCP server in PolicyLayer and add a rule for cache_entry: 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 LiveJournal MCP Server. Nothing to install.

What risk level is cache_entry? +

cache_entry is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit cache_entry? +

Yes. Add a rate_limit block to the cache_entry 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.

How do I block cache_entry completely? +

Set action: deny in the PolicyLayer policy for cache_entry. 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.

What MCP server provides cache_entry? +

cache_entry is provided by the LiveJournal MCP Server MCP server (pavelber/livejournal-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

// THE FULL RECORD

cache_entry is one line of LiveJournal MCP Server's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

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