device_primary_set

Mark a device as the primary (auto-connect) target. Accepts a deviceId or unique prefix. Pass clear:true instead to unset the preference.

SERVERYaver SOURCEyaver-cli

Medium RISK CLASS

Category Write

Parameters 20 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-kivanccakmak-yaver/device-primary-set.md

WHAT IT DOES

What device_primary_set does on Yaver

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

Parameter	Type	Required	Description
`clear`	boolean	—	Unset the preference instead of picking a device.
`deviceId`	string	—	Full deviceId or unique prefix. Ignored when clear=true.

Parameters from the server's own tool schema.

RISK

Why device_primary_set is rated Medium

This tool modifies system configuration by changing which device is the auto-connect target. While reversible (can be unset with clear:true), it affects the runtime behavior and connection preferences of the development environment. This is a Write operation because it updates persistent configuration state, not a Read (no retrieval) or Execute (no code/command execution).

From the tool's definition Tool accepts a deviceId or unique prefix to mark a device as 'primary (auto-connect) target', or 'clear:true' to unset the preference. These are reversible configuration modifications that persist state.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs device_primary_set safely

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

device_primary_set Rate-limited

device_primary_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": {
    "device_primary_set": {
      "limits": [
        {
          "counter": "device_primary_set_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about device_primary_set

What does the device_primary_set tool do? +

Mark a device as the primary (auto-connect) target. Accepts a deviceId or unique prefix. Pass clear:true instead to unset the preference. It is categorised as a Write tool in the Yaver MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does device_primary_set accept? +

device_primary_set accepts 2 parameters: clear, deviceId. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on device_primary_set? +

Register the Yaver MCP server in PolicyLayer and add a rule for device_primary_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 Yaver. Nothing to install.

What risk level is device_primary_set? +

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

Can I rate-limit device_primary_set? +

Yes. Add a rate_limit block to the device_primary_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 device_primary_set completely? +

Set action: deny in the PolicyLayer policy for device_primary_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 device_primary_set? +

device_primary_set is provided by the Yaver MCP server (yaver-cli). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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