trmnl_create_room_booking_calendar

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

Annotations already declare a non-read-only, open-world mutation, and the description adds substantive context: the feed itself is read-only and bookings happen in the source calendar, and the POST endpoint is disclosed. It does not cover failure modes (invalid ics_url, duplicate feed) or whether the added calendar is immediately synced, keeping it from a 5.

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

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

The core intent is front-loaded correctly and the iCal read-only caveat earns its place, but 'TRMNL POST /api/...' and the generic 'Changes remote state or starts work. Run only within the user-authorized scope.' boilerplate dilute an otherwise short description.

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

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

For a create tool with a nested body object, no output schema, and only 33% parameter coverage, the description should say something about the required name/ics_url or what the optional display settings do. As written, the parameter surface is undocumented outside the raw schema.

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

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

Schema description coverage is only 33% and the description mentions no parameters at all. Required body fields (name, ics_url) and optional ones (capacity, timezone, show_booking_qr, show_company_logo) are left entirely to the schema, so the description does not compensate for the coverage gap.

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

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

The description opens with a specific verb and resource ('Add an iCal calendar') and narrows the scope to iCal feeds, which distinguishes it from the Google/Microsoft connection path. It never names the sibling tools (trmnl_list_room_booking_calendars, trmnl_update_room_booking_calendar), so it stops short of a 5.

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

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

It clearly implies when this tool applies: iCal feeds only, while Google and Microsoft calendars must be connected in the browser because they require owner sign-in. That is real routing guidance, though no explicit 'do not use this for X' statement or reference to the update/delete calendar siblings.

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