Medium Risk

resolve_lookup

Resolve an organization slug to its MCP/REST endpoints and trust level — the DNS of professional services. Use this when you know the org_slug and need its API endpoint before calling any other tool. Do NOT use for searching by vertical or location (use resolve.search or registry.search instead)....

Part of the Servicialo server.

resolve_lookup can modify Servicialo data, with no limits today. PolicyLayer puts allow, deny, and rate-limit rules on every call. Live in minutes.

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AI agents use resolve_lookup to create or modify resources in Servicialo. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.

Without a policy, an AI agent could call resolve_lookup repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Servicialo.

Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "resolve_lookup": {
      "limits": [
        {
          "counter": "resolve_lookup_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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These attack patterns abuse exactly the kind of access resolve_lookup gives an agent. Each links to the full case and the policy that stops it:

Browse the full MCP Attack Database →

Every attack above starts with a tool call. PolicyLayer checks each one against your policy first, so resolve_lookup only ever does what you allow.

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Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.

What does the resolve_lookup tool do? +

Resolve an organization slug to its MCP/REST endpoints and trust level — the DNS of professional services. Use this when you know the org_slug and need its API endpoint before calling any other tool. Do NOT use for searching by vertical or location (use resolve.search or registry.search instead). Returns: endpoint URLs, trust score (0-100), trust level, and last heartbeat timestamp.. It is categorised as a Write tool in the Servicialo MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on resolve_lookup? +

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

What risk level is resolve_lookup? +

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

Can I rate-limit resolve_lookup? +

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

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

resolve_lookup is provided by the Servicialo MCP server (@servicialo/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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