search_repl_history

THE RISK

Low Risk

Why search_repl_history needs a policy

This tool performs a search query over historical data. It retrieves or queries existing information about Repl development sessions without creating, modifying, deleting, or executing code. The verb 'search' is characteristic of Read operations. No side effects or state changes occur.

From the tool's definition Tool name 'search_repl_history' and description 'Search through Repl development history' indicate a retrieval operation with no modification or deletion capability.

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

POLICY

How to control search_repl_history

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

policy.json

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

search_repl_history 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 SAM — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

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All 37 SAM tools →

Read tools on other servers

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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 search_repl_history

What does the search_repl_history tool do? +

Search through Repl development history. It is categorised as a Read tool in the SAM MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on search_repl_history? +

Register the SAM MCP server in PolicyLayer and add a rule for search_repl_history: 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 SAM. Nothing to install.

What risk level is search_repl_history? +

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

Can I rate-limit search_repl_history? +

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

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

search_repl_history is provided by the SAM MCP server (pigrieco/mcp-memory-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every SAM tool call.

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

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