evidence_chain

Get full provenance chain from a node ID in specified direction.

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/evidence-chain.md

WHAT IT DOES

What evidence_chain does on Jshookmcp

AI agents call evidence_chain 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 evidence_chain is rated Low

Retrieves provenance metadata without modifying data or triggering external operations.

From the tool's definition Get full provenance chain from a node ID in specified direction

Attacks that exploit this kind of access

RECOMMENDED RULE

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

evidence_chain Allowed

evidence_chain 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": {
    "evidence_chain": {}
  }
}

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 evidence_chain call is checked against it from then on.

FAQ

Questions about evidence_chain

What does the evidence_chain tool do? +

Get full provenance chain from a node ID in specified direction. 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 evidence_chain? +

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

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

Can I rate-limit evidence_chain? +

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

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

evidence_chain 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.

KEEP EXPLORING

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