happy_zen_link_session · Happy Server MCP: Risk & Policy

WHAT IT DOES

What happy_zen_link_session does on Happy Server MCP

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

WHY IT NEEDS A POLICY

Why happy_zen_link_session needs a policy

This tool creates an association (link) between a todo item and a session, which is a reversible write operation that modifies metadata/relationships. It does not delete, execute code, or move money.

From the tool's definition Link a Zen (todo) item to a Happy session with a display title

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

happy_zen_link_session Rate-limited

happy_zen_link_session 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": {
    "happy_zen_link_session": {
      "limits": [
        {
          "counter": "happy_zen_link_session_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 Happy Server MCP, so you can run agents against it safely.

FAQ

Questions about happy_zen_link_session

What does the happy_zen_link_session tool do? +

Link a Zen (todo) item to a Happy session with a display title. It is categorised as a Write tool in the Happy Server MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on happy_zen_link_session? +

Register the Happy Server MCP server in PolicyLayer and add a rule for happy_zen_link_session: 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 Happy Server MCP. Nothing to install.

What risk level is happy_zen_link_session? +

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

Can I rate-limit happy_zen_link_session? +

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

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

happy_zen_link_session is provided by the Happy Server MCP server (zhigang1992/happy-server-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.