High Risk →

query

Execute SurrealQL queries. Returns results array with per-query status and data.

How to control query ↓

What query does on Surreal

AI agents invoke query to trigger actions in Surreal. 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.

High Risk

Why query needs a policy

This tool runs arbitrary SurrealQL queries against a SurrealDB database. SurrealQL supports DDL and DML operations including SELECT, INSERT, UPDATE, DELETE, DROP, DEFINE, REMOVE, and more.

From the tool's definition "Execute SurrealQL queries" — arbitrary query execution with no stated restrictions

Documented attack patterns abuse exactly the kind of access query gives an agent:

How to control query

PolicyLayer is an MCP gateway — it sits between your AI agents and Surreal, and nothing reaches the server without passing your rules. This is the rule we recommend for query:

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "query": {
      "limits": [
        {
          "counter": "query_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

query 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.

  1. Create a free account and register Surreal — nothing to install.
  2. Add this policy — paste it, or build it visually.
  3. Point your MCP client (Claude, Cursor, anything) at your gateway URL.
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Related tools and policies

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Questions about query

What does the query tool do? +

Execute SurrealQL queries. Returns results array with per-query status and data. It is categorised as a Execute tool in the Surreal MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on query? +

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

What risk level is query? +

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

Can I rate-limit query? +

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

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

query is provided by the Surreal MCP server (lfnovo/surreal-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Surreal tool call.

Start from Surreal, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

Free to start. No card required.

10 Surreal tools catalogued and risk-classified — across an index of 43,000+ MCP servers.

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