add_card_member · Superthread Mcp Extended MCP

WHAT IT DOES

What add_card_member does on Superthread Mcp Extended

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

WHY IT NEEDS A POLICY

Why add_card_member needs a policy

This tool modifies card state by adding a member assignment, which is a write operation (creates a relationship between a card and a user). It is reversible (members can be removed) and has no destructive or financial implications. The blast radius is medium because incorrect assignments could misdirect work, but the impact is limited to task metadata and easily correctable.

From the tool's definition Tool name 'add_card_member' and description 'Add a member (assignee) to a card' indicates creation/modification of card metadata by adding an assignee relationship. This is a reversible write operation typical of task management systems.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_card_member Rate-limited

add_card_member 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_card_member": {
      "limits": [
        {
          "counter": "add_card_member_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

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

FAQ

Questions about add_card_member

What does the add_card_member tool do? +

Add a member (assignee) to a card with optional role. Use this to assign tasks to users. It is categorised as a Write tool in the Superthread Mcp Extended 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_card_member? +

Register the Superthread Mcp Extended MCP server in PolicyLayer and add a rule for add_card_member: 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 Superthread Mcp Extended. Nothing to install.

What risk level is add_card_member? +

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

Can I rate-limit add_card_member? +

Yes. Add a rate_limit block to the add_card_member 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_card_member completely? +

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

add_card_member is provided by the Superthread Mcp Extended MCP server (jaey-p/superthread-mcp-extended). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.