instrumentation_session_merge

Merge two sessions into a new session: copies operations (with id remapping) and artifacts from both sources. Original sessions are untouched.

SERVERJshookmcp SOURCE@jshookmcp/jshook

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/io-github-vmoranv-jshookmcp/instrumentation-session-merge.md

WHAT IT DOES

What instrumentation_session_merge does on Jshookmcp

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

RISK

Why instrumentation_session_merge is rated Medium

Creates new merged data structure by copying and remapping existing session content without deletion.

From the tool's definition copies operations and artifacts from both sources, creates new session

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs instrumentation_session_merge safely

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

instrumentation_session_merge Rate-limited

instrumentation_session_merge 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": {
    "instrumentation_session_merge": {
      "limits": [
        {
          "counter": "instrumentation_session_merge_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 Jshookmcp, apply this rule, and every instrumentation_session_merge call is checked against it from then on.

FAQ

Questions about instrumentation_session_merge

What does the instrumentation_session_merge tool do? +

Merge two sessions into a new session: copies operations (with id remapping) and artifacts from both sources. Original sessions are untouched. It is categorised as a Write tool in the Jshookmcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on instrumentation_session_merge? +

Register the Jshook MCP server in PolicyLayer and add a rule for instrumentation_session_merge: 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 Jshookmcp. Nothing to install.

What risk level is instrumentation_session_merge? +

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

Can I rate-limit instrumentation_session_merge? +

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

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

instrumentation_session_merge is provided by the Jshook MCP server (@jshookmcp/jshook). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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