compress_session_history

Compress old session data using conversation summarization

SERVERClaude MCP Server Ecosystem SOURCEcoder-rl/claude_mcpserver_dev1

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/coder-rl-claude-mcpserver-dev1/compress-session-history.md

WHAT IT DOES

What compress_session_history does on Claude MCP Server Ecosystem

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

RISK

Why compress_session_history is rated Medium

This tool modifies existing session history data by compressing/summarizing it. While the original data may be replaced with a summary (potentially losing detail), this is a reversible-class write operation in typical implementations rather than a hard delete. However, since summarization may lose granular detail, there is some destructive potential.

From the tool's definition 'Compress old session data using conversation summarization'

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs compress_session_history safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Claude MCP Server Ecosystem, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For compress_session_history, this is the rule to start with:

compress_session_history Rate-limited

compress_session_history 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": {
    "compress_session_history": {
      "limits": [
        {
          "counter": "compress_session_history_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Claude MCP Server Ecosystem, apply this rule, and every compress_session_history call is checked against it from then on.

FAQ

Questions about compress_session_history

What does the compress_session_history tool do? +

Compress old session data using conversation summarization. It is categorised as a Write tool in the Claude MCP Server Ecosystem MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on compress_session_history? +

Register the Claude MCP Server Ecosystem MCP server in PolicyLayer and add a rule for compress_session_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 Claude MCP Server Ecosystem. Nothing to install.

What risk level is compress_session_history? +

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

Can I rate-limit compress_session_history? +

Yes. Add a rate_limit block to the compress_session_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 compress_session_history completely? +

Set action: deny in the PolicyLayer policy for compress_session_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 compress_session_history? +

compress_session_history is provided by the Claude MCP Server Ecosystem MCP server (coder-rl/claude_mcpserver_dev1). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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