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

Annotations already declare destructiveHint=true and readOnlyHint=false, so the safety profile is partly covered. The description adds real value about the post-call flow: some connectors require a follow-up choice and the result links there. However, it never explains what is destructive — e.g. whether attaching a connection replaces or invalidates an existing site connection — which is the most important behavioral fact for an agent to convey.

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?

Three short sentences, with the trigger condition front-loaded before the parameter sourcing and the follow-up caveat. No filler, though the last sentence could be tightened.

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?

With no output schema, the description usefully sketches the return case ('the result says so and links there') and covers the multi-step flow most agents would miss. The main gap is the absence of any warning about the destructive effect implied by the annotations.

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 coverage is 67%; connector and connection_id are documented in the schema (with a slug example), but site_id is undescribed. The description reinforces that connection_id comes from list-connectors but adds no new semantics and says nothing about which site is affected or how site_id pairs with connector.

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?

States a specific verb and resource: making a WebTwizz site use an already-connected account, with concrete examples (Stripe, Supabase, GitHub). It is clearly distinguishable from the sibling list-connectors, which only enumerates connections, and from connect-domain, which is about domains.

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?

Gives an explicit trigger ('when the user wants one of their sites to use an account they already connected') and names the prerequisite source tool list-connectors. It lacks an explicit when-not or an alternative for the case where the user has not connected the account yet (presumably list-connectors/connector overview), so it falls short of a 5.

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