add_attachments_to_set · AWS IoT SiteWise MCP Server MCP

WHAT IT DOES

What add_attachments_to_set does on AWS IoT SiteWise MCP Server

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

WHY IT NEEDS A POLICY

Why add_attachments_to_set needs a policy

The verb 'add' and operation pattern 'add_attachments_to_set' suggest creating or appending attachments to a data structure, which is a Write category action (creates or modifies data reversibly). Without a description, confidence is moderate; however, the lack of 'delete' or destructive language and the reversible nature of 'adding' attachments keeps this in Write rather than Destructive.

From the tool's definition Tool name 'add_attachments_to_set' indicates a create/modify operation that attaches items to a collection. The description is empty, reducing specificity.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_attachments_to_set Rate-limited

add_attachments_to_set 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_attachments_to_set": {
      "limits": [
        {
          "counter": "add_attachments_to_set_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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

FAQ

Questions about add_attachments_to_set

What does the add_attachments_to_set tool do? +

add_attachments_to_set. It is categorised as a Write tool in the AWS IoT SiteWise MCP Server 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_attachments_to_set? +

Register the AWS IoT SiteWise MCP Server MCP server in PolicyLayer and add a rule for add_attachments_to_set: 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 AWS IoT SiteWise MCP Server. Nothing to install.

What risk level is add_attachments_to_set? +

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

Can I rate-limit add_attachments_to_set? +

Yes. Add a rate_limit block to the add_attachments_to_set 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_attachments_to_set completely? +

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

add_attachments_to_set is provided by the AWS IoT SiteWise MCP Server MCP server (awslabs.aws-iot-sitewise-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.