trmnl_start_plugin_installations_connection

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

Annotations already declare readOnlyHint=false, openWorldHint=true and idempotentHint=false, so safety profile is covered. The description's 'Changes remote state or starts work' largely restates that. It adds a small amount beyond annotations by signaling this kicks off an authorization flow, but omits that the attempt is async and must be polled/confirmed (trmnl_get_connection_attempt, trmnl_confirm_connection_attempt), which is the most operationally important trait here.

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?

It is short and the action is front-loaded, but 'for the exact target' is wasted wording and the 'Changes remote state or starts work' sentence duplicates annotation content. The space saved by brevity is spent on filler rather than on parameter or flow guidance.

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?

This is a non-idempotent, state-mutating auth-start operation with a nested 3-field body and no output schema. The description gives no indication of the resulting attempt lifecycle, required identifiers' meaning, or next steps, leaving significant gaps for an agent to invoke it correctly.

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 33% and the nested body (action_id, revision, callback_id) is entirely undocumented in both schema and description. The endpoint path at least reveals the two path parameters' names, but there is zero explanation of what action_id/revision represent or how callback_id='companion' should be chosen, 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 states the action ('Start provider authorization') and names the exact endpoint, so the resource is identifiable. However, 'for the exact target' is vague filler, and it never clarifies how this differs from the very similar sibling trmnl_start_plugin_settings_connection (installation-scoped vs setting-scoped). The verb+resource pairing is adequate but sibling differentiation is absent.

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?

The only guidance is 'Run only within the user-authorized scope', which is a generic caution rather than a when-to-use rule. Nothing says when to pick this over trmnl_start_plugin_settings_connection, nor when it should not be called (e.g. an attempt already in flight).

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