meshes_emit_event · Mesheshq MCP: Risk & Policy

WHAT IT DOES

What meshes_emit_event does on Mesheshq

AI agents invoke meshes_emit_event to trigger actions in Mesheshq. 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.

WHY IT NEEDS A POLICY

Why meshes_emit_event needs a policy

Emitting an event is an external operation that triggers downstream routing and delivery workflows in the Meshes integration layer. This is not a simple write of stored data; it actively triggers processing pipelines and integrations in external systems. The blast radius is high because a misused event could trigger unintended downstream actions across all connected integrations at the organization level.

From the tool's definition 'Emit a product event to Meshes for routing and delivery' — triggers external operations (event routing and delivery) whose effects depend on arguments

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

meshes_emit_event Rate-limited

meshes_emit_event 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "meshes_emit_event": {
      "limits": [
        {
          "counter": "meshes_emit_event_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about meshes_emit_event

What does the meshes_emit_event tool do? +

Emit a product event to Meshes for routing and delivery. Because this MCP server uses organization-level machine credentials, workspace is required for each emitted event. Always include. It is categorised as a Execute tool in the Mesheshq MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on meshes_emit_event? +

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

What risk level is meshes_emit_event? +

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

Can I rate-limit meshes_emit_event? +

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

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

meshes_emit_event is provided by the Mesheshq MCP server (mesheshq/meshes-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.