preview_action

Dry-run governance preview of a tool call WITHOUT executing it. Validates the args against the tool

SERVERAirMCP SOURCEairmcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/heznpc-airmcp/preview-action.md

WHAT IT DOES

What preview_action does on AirMCP

AI agents call preview_action to retrieve information from AirMCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why preview_action is rated Low

The tool explicitly states it is a dry-run that does NOT execute the action. It only validates arguments, making it a read/inspection operation with no side effects. Very low blast radius.

From the tool's definition Dry-run governance preview of a tool call WITHOUT executing it. Validates the args against the tool

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs preview_action safely

PolicyLayer is an MCP gateway: it sits between your AI agents and AirMCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For preview_action, this is the rule to start with:

preview_action Allowed

preview_action is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "preview_action": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect AirMCP, apply this rule, and every preview_action call is checked against it from then on.

FAQ

Questions about preview_action

What does the preview_action tool do? +

Dry-run governance preview of a tool call WITHOUT executing it. Validates the args against the tool. It is categorised as a Read tool in the AirMCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on preview_action? +

Register the Air MCP server in PolicyLayer and add a rule for preview_action: 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 AirMCP. Nothing to install.

What risk level is preview_action? +

preview_action is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit preview_action? +

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

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

preview_action is provided by the Air MCP server (airmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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