wiki_graphql · Mcp Wikijs Mv MCP: Risk & Policy

WHAT IT DOES

What wiki_graphql does on Mcp Wikijs Mv

AI agents invoke wiki_graphql to trigger actions in Mcp Wikijs Mv. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why wiki_graphql needs a policy

A tool that executes arbitrary GraphQL queries and mutations is classified as Execute because it runs code whose effects entirely depend on user-supplied arguments. The mutation surface includes potential write, destructive, and read operations.

From the tool's definition "Run an arbitrary Wiki.js GraphQL query or mutation" - the tool explicitly permits arbitrary GraphQL operations, which can query, modify, or delete wiki data depending on the mutation sent.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

wiki_graphql Rate-limited

wiki_graphql stays usable, but rate-capped — a runaway agent can't fire it dozens of times 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_graphql": {
      "limits": [
        {
          "counter": "wiki_graphql_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about wiki_graphql

What does the wiki_graphql tool do? +

Run an arbitrary Wiki.js GraphQL query or mutation. Use for any operation not covered by a. It is categorised as a Execute tool in the Mcp Wikijs Mv MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on wiki_graphql? +

Register the Mcp Wikijs Mv MCP server in PolicyLayer and add a rule for wiki_graphql: 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 Mcp Wikijs Mv. Nothing to install.

What risk level is wiki_graphql? +

wiki_graphql is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit wiki_graphql? +

Yes. Add a rate_limit block to the wiki_graphql 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_graphql completely? +

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

wiki_graphql is provided by the Mcp Wikijs Mv MCP server (janschachtschabel/mcp-for-wiki-js). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.