trmnl_get_plugin_setting_timeline

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

Annotations already declare readOnly, idempotent, non-destructive and open-world, so the safety profile is covered. The description adds genuinely useful behavior the annotations cannot: for the current day, entries are expected/scheduled rather than recorded, which prevents an agent from misreading future check-ins as facts. It omits auth, rate limits, and result-size behavior, keeping it below 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 scope sentence is front-loaded and dense with real information, and the whole thing is three short lines. The trailing raw endpoint line ('TRMNL GET /api/...') adds little for an agent but is short and harmless.

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?

There is no output schema, and the description only loosely sketches the return shape (check-in entries each naming a device) without indicating ordering, volume, or what an entry contains. Combined with the thin parameter coverage and no explicit sibling routing, it is adequate but leaves meaningful gaps for a nested-parameter tool.

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?

All three parameters are documented only by the schema, and schema coverage is reported at 33%; the description never mentions the plugin setting id, the date argument, or the profile selector. The phrase 'one day' and 'on today' hint at the date parameter's meaning but give no format, timezone, or default guidance to compensate for the low coverage.

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 states a specific verb (read) and resource (a plugin setting's timeline) and then defines the scope precisely: one day, across every device that shows the setting, with recorded check-ins plus today's expected ones. That scoping implicitly separates it from siblings like trmnl_get_device_timeline and trmnl_get_mashup_timeline, but those siblings are never named, so the agent must infer the boundary.

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?

Usage context is implied by 'one day of a plugin setting across every device,' but there is no explicit when-to-use/when-not statement and no mention of the alternative timeline tools. An agent can guess the right context but gets no routing help or exclusions.

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