instrumentation_session_diff

Diff two instrumentation session snapshots: operations added/removed/common (by id) plus artifact fingerprints and per-type counts. Pure compare, mutates nothing.

SERVERJshookmcp SOURCE@jshookmcp/jshook

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-vmoranv-jshookmcp/instrumentation-session-diff.md

WHAT IT DOES

What instrumentation_session_diff does on Jshookmcp

AI agents call instrumentation_session_diff to retrieve information from Jshookmcp without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why instrumentation_session_diff is rated Low

Tool performs comparison analysis only without modifying data or triggering external operations.

From the tool's definition Diff two instrumentation session snapshots. Pure compare, mutates nothing.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs instrumentation_session_diff 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_diff, this is the rule to start with:

instrumentation_session_diff Allowed

instrumentation_session_diff is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY 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_diff call is checked against it from then on.

FAQ

Questions about instrumentation_session_diff

What does the instrumentation_session_diff tool do? +

Diff two instrumentation session snapshots: operations added/removed/common (by id) plus artifact fingerprints and per-type counts. Pure compare, mutates nothing. It is categorised as a Read tool in the Jshookmcp MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on instrumentation_session_diff? +

Register the Jshook MCP server in PolicyLayer and add a rule for instrumentation_session_diff: 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_diff? +

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

Can I rate-limit instrumentation_session_diff? +

Yes. Add a rate_limit block to the instrumentation_session_diff 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_diff completely? +

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

instrumentation_session_diff 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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