wiki_append_article · Exocortex MCP: Risk & Policy

WHAT IT DOES

What wiki_append_article does on Exocortex

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

WHY IT NEEDS A POLICY

Why wiki_append_article needs a policy

This tool creates or modifies wiki article content by appending or replacing sections. While 'replace' could overwrite content, journal-style wikis typically retain history, making this a reversible write operation. The blast radius is medium since an AI agent could corrupt or overwrite important stored memories/knowledge.

From the tool's definition 'Append or replace a dated section in a journal-style wiki article'

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

wiki_append_article Rate-limited

wiki_append_article 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": {
    "wiki_append_article": {
      "limits": [
        {
          "counter": "wiki_append_article_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 Exocortex, so you can run agents against it safely.

FAQ

Questions about wiki_append_article

What does the wiki_append_article tool do? +

Append or replace a dated section in a journal-style wiki article. It is categorised as a Write tool in the Exocortex MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on wiki_append_article? +

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

What risk level is wiki_append_article? +

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

Can I rate-limit wiki_append_article? +

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

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

wiki_append_article is provided by the Exocortex MCP server (shawnhack/exocortex). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.