merge_documents · ContextForge MCP Gateway MCP

WHAT IT DOES

What merge_documents does on ContextForge MCP Gateway

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

WHY IT NEEDS A POLICY

Why merge_documents needs a policy

This tool performs a Write operation—it creates a new combined document by merging inputs, which is a reversible modification of data. While the merge itself is not destructive (original documents may persist), it creates a new artifact and modifies the information structure.

From the tool's definition Tool name 'merge_documents' and description 'Merge multiple documents into one file' indicate creation/modification of data through combining existing documents.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

merge_documents Rate-limited

merge_documents 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": {
    "merge_documents": {
      "limits": [
        {
          "counter": "merge_documents_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches ContextForge MCP Gateway, so you can run agents against it safely.

FAQ

Questions about merge_documents

What does the merge_documents tool do? +

Merge multiple documents into one file. It is categorised as a Write tool in the ContextForge MCP Gateway MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on merge_documents? +

Register the ContextForge MCP Gateway MCP server in PolicyLayer and add a rule for merge_documents: 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 ContextForge MCP Gateway. Nothing to install.

What risk level is merge_documents? +

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

Can I rate-limit merge_documents? +

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

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

merge_documents is provided by the ContextForge MCP Gateway MCP server (jrmatherly/mcp-context-forge). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.