add_member_to_space · Superthread Mcp Extended MCP

WHAT IT DOES

What add_member_to_space does on Superthread Mcp Extended

AI agents use add_member_to_space 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_member_to_space needs a policy

This tool creates or modifies user access and role assignments within a space, which is a Write operation (creates new membership records). It's not Read (retrieves data), not Execute (doesn't run arbitrary code), not Destructive (member addition is reversible via removal), and not Financial.

From the tool's definition Tool name 'add_member_to_space' and description 'Adds a member to an existing space with optional role' indicate creation/modification of membership data. The action is reversible (members can be removed).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_member_to_space Rate-limited

add_member_to_space 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_member_to_space": {
      "limits": [
        {
          "counter": "add_member_to_space_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 Superthread Mcp Extended, so you can run agents against it safely.

FAQ

Questions about add_member_to_space

What does the add_member_to_space tool do? +

Adds a member to an existing space with optional role. 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_member_to_space? +

Register the Superthread Mcp Extended MCP server in PolicyLayer and add a rule for add_member_to_space: 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_member_to_space? +

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

Can I rate-limit add_member_to_space? +

Yes. Add a rate_limit block to the add_member_to_space 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_member_to_space completely? +

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

add_member_to_space 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.