write_batch · TermPipe MCP: Risk & Policy

WHAT IT DOES

What write_batch does on TermPipe MCP

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

WHY IT NEEDS A POLICY

Why write_batch needs a policy

The 'write_batch' name and context of file management tools on this terminal-access server strongly suggest this creates or modifies data in batch. Without a description, confidence is reduced, but the write operation category is most likely.

From the tool's definition Tool name 'write_batch' suggests batch writing operations. Server description emphasizes 'direct terminal access' and 'manage files', and sibling tools include 'append_file' and 'write'-class operations, indicating file/data modification capability.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

write_batch Rate-limited

write_batch 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": {
    "write_batch": {
      "limits": [
        {
          "counter": "write_batch_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 TermPipe MCP, so you can run agents against it safely.

FAQ

Questions about write_batch

What does the write_batch tool do? +

write_batch. It is categorised as a Write tool in the TermPipe MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on write_batch? +

Register the TermPipe MCP server in PolicyLayer and add a rule for write_batch: 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 TermPipe MCP. Nothing to install.

What risk level is write_batch? +

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

Can I rate-limit write_batch? +

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

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

write_batch is provided by the TermPipe MCP server (wbind-core/termpipe-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.