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trmnl_bind_room_booking_collection_device

Idempotent

Binds a room booking collection screen to a device playlist once so the device can display it. Use it to associate a collection with a device within authorized scope.

Instructions

Show a collection on a device Adds the collection screen to the device playlist once. Billing works as for bindRoomBookingCalendarDevice. TRMNL PUT /api/apps/room_booking/{installation_id}/collections/{id}/devices/{device_id}. Changes remote state or starts work. Run only within the user-authorized scope.

Input Schema

NameRequiredDescriptionDefault
pathYes
profileNoConfigured profile name; defaults to default.

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.2.1

TDQS

B3.1/5.0
Behavior3/5

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

Annotations already declare non-read-only, idempotent and non-destructive, and the phrase 'adds the collection screen ... once' reinforces idempotency. Beyond that the description mostly restates annotation content ('Changes remote state or starts work') and the billing sentence points to an external tool without explaining anything itself.

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

Conciseness3/5

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

The lead sentence is front-loaded and effective, but the raw HTTP route line and the 'billing works as for bindRoomBookingCalendarDevice' cross-reference consume space without guiding the agent. Roughly half the text is filler.

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

Completeness3/5

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

For a mutating, open-world tool with no output schema, the description covers the basic effect but omits what happens on repeat calls, whether a playlist slot is appended or replaced, and what error conditions (unknown collection/device) look like. Adequate but with clear gaps.

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

Parameters2/5

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

With only 50% schema description coverage and a nested path object of three ids, the description says nothing about installation_id, collection id, or the notable 'url' option for device_id (browser display). The description does not compensate for the schema gap at all.

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

Purpose4/5

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

The description states a concrete action on a specific resource: 'Adds the collection screen to the device playlist once,' backed by the exact API route. It is distinguishable from siblings like trmnl_unbind_room_booking_collection_device, but it never explains how this differs from trmnl_bind_room_booking_calendar_device, which it merely references for billing.

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

Usage Guidelines3/5

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

'Run only within the user-authorized scope' is a loose safety hint, not a usage rule. There is no explicit statement of when to prefer this over binding a calendar device, nor any prerequisite such as the collection or device needing to exist first.

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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