High Risk →

package-resolve

Resolves Swift package dependencies and returns structured resolution results.

How to control package-resolve ↓

What package-resolve does on Http

AI agents invoke package-resolve to trigger actions in Http. 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 package-resolve needs a policy

Resolving Swift package dependencies is not a pure read; it executes the Swift Package Manager resolver, which downloads packages from remote sources and updates the Package.resolved file. This constitutes an external operation with side effects on the filesystem and network, placing it in the Execute category.

From the tool's definition 'Resolves Swift package dependencies' — dependency resolution actively fetches remote packages, modifies Package.resolved lockfiles, and triggers network operations and filesystem writes.

Documented attack patterns abuse exactly the kind of access package-resolve gives an agent:

How to control package-resolve

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

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "package-resolve": {
      "limits": [
        {
          "counter": "package-resolve_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

package-resolve 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 Http — 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.
RATE-LIMIT THIS TOOL →

Free to start. No card required.

Related tools and policies

Go deeper

Questions about package-resolve

What does the package-resolve tool do? +

Resolves Swift package dependencies and returns structured resolution results. It is categorised as a Execute tool in the Http MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on package-resolve? +

Register the Http MCP server in PolicyLayer and add a rule for package-resolve: 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 Http. Nothing to install.

What risk level is package-resolve? +

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

Can I rate-limit package-resolve? +

Yes. Add a rate_limit block to the package-resolve 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 package-resolve completely? +

Set action: deny in the PolicyLayer policy for package-resolve. 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 package-resolve? +

package-resolve is provided by the Http MCP server (@paretools/http). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Http tool call.

Start from Http, 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.

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

// GET IN TOUCH

Have a question or want to learn more? Send us a message.

Message sent.

We'll get back to you soon.