add_to_hand · Codecks MCP: Risk & Policy

WHAT IT DOES

What add_to_hand does on Codecks

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

WHY IT NEEDS A POLICY

Why add_to_hand needs a policy

The tool creates or modifies an assignment relationship between cards and a user, which is a reversible data modification. It does not delete data (Destructive), execute arbitrary code (Execute), involve financial transactions (Financial), or merely read data (Read).

From the tool's definition Tool name 'add_to_hand' and description 'Add cards to the user' indicates a modification operation that assigns cards to a user's hand/collection. This is a state-changing operation on project data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_to_hand Rate-limited

add_to_hand 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": {
    "add_to_hand": {
      "limits": [
        {
          "counter": "add_to_hand_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 Codecks, so you can run agents against it safely.

FAQ

Questions about add_to_hand

What does the add_to_hand tool do? +

Add cards to the user. It is categorised as a Write tool in the Codecks MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_to_hand? +

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

What risk level is add_to_hand? +

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

Can I rate-limit add_to_hand? +

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

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

add_to_hand is provided by the Codecks MCP server (rangogamedev/codecks-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.