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remove_device

Permanently unlink a secondary device from your Signal account, immediately revoking its message access. This action is irreversible.

Instructions

Permanently unlink a secondary device from your Signal account. The device loses access to send and receive messages immediately. device_id must be a secondary device (ID ≥ 2) — you cannot unlink your primary device. The removed device is not notified; it simply stops receiving messages. This action is irreversible — the device must re-link via add_device to regain access. Use list_devices to find the device_id you want to remove. Use update_device to rename a device without removing it.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
device_idYesDevice ID (get from list_devices)
Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations provided, so description carries full burden. It discloses immediate loss of access, no notification to device, irreversibility, and need to re-link via add_device.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Five sentences, all essential, with key action upfront. No unnecessary words or repetition.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given simple input schema (1 param with 100% coverage) and no output schema, the description covers all aspects: purpose, constraints, consequences, and related tools.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters5/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, but description adds crucial constraints: device_id must be ≥2 (secondary device) and suggests using list_devices to obtain it, enhancing understanding beyond schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description states 'Permanently unlink a secondary device from your Signal account', providing a specific verb and resource. It distinguishes from sibling tools by mentioning list_devices and update_device as alternatives.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description explicitly states when to use (remove secondary device), when not to (cannot unlink primary device), and suggests alternatives (list_devices to find ID, update_device to rename instead).

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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