find_patterns

THE RISK

Low Risk

Why find_patterns needs a policy

find_patterns retrieves and analyzes conversation history to identify patterns. It has no side effects, does not modify or delete data, does not execute code or commands, and does not involve financial transactions. The operation is purely informational — extracting insights from existing data. This is classic Read category behavior.

From the tool's definition Tool performs discovery and analysis operations: "Discover recurring patterns", "common topics", "frequent workflows", "repeated issues" — all read-only aggregation and analysis of historical data without modification or deletion.

Documented attack patterns abuse exactly the kind of access find_patterns gives an agent:

POLICY

How to control find_patterns

PolicyLayer is an MCP gateway — it sits between your AI agents and ClaudeHistoryMCP, and nothing reaches the server without passing your rules. This is the rule we recommend for find_patterns:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "find_patterns": {}
  }
}

find_patterns is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register ClaudeHistoryMCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More ClaudeHistoryMCP tools

Write cloud_sync_push Push local knowledge entries and session summaries to the cloud server. Only pushes entrie Read cloud_sync_pull Pull knowledge entries and session summaries from the cloud server. Merges with local data Read cloud_sync_status Check cloud sync configuration and connection status. Shows whether sync is configured, la Read find_solutions Search past conversations for solutions to errors or problems. Prioritizes results contain Read get_project_context Get comprehensive context for a project: recent sessions, key topics, common tools, and pa Read get_session_summary Get a structured summary of a conversation session. Provide either a session ID or project Read list_projects List all projects that have Claude Code conversation history, with session counts and acti Read search_history Search past Claude Code conversations. Supports filter syntax: project:name, before:date,

All 9 ClaudeHistoryMCP tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about find_patterns

What does the find_patterns tool do? +

Discover recurring patterns in conversation history: common topics, frequent workflows, repeated issues. It is categorised as a Read tool in the ClaudeHistoryMCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on find_patterns? +

Register the ClaudeHistory MCP server in PolicyLayer and add a rule for find_patterns: 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 ClaudeHistoryMCP. Nothing to install.

What risk level is find_patterns? +

find_patterns is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit find_patterns? +

Yes. Add a rate_limit block to the find_patterns 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 find_patterns completely? +

Set action: deny in the PolicyLayer policy for find_patterns. 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 find_patterns? +

find_patterns is provided by the ClaudeHistory MCP server (jhammant/claudehistorymcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every ClaudeHistoryMCP tool call.

Start from ClaudeHistoryMCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →