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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so safety is covered. The description adds useful behavior beyond that: the slug-absent fallback to overview and the human-consent rule before installing. It says nothing about link expiry, permissions, or error conditions for a closed-world link generator.

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?

Four short sentences, front-loaded with the usage trigger and followed by return behavior and constraints. Every sentence carries information; no filler or restated field names.

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 simple read-only link generator with no output schema, the description covers purpose, return shape, and fallback behavior well. The gap is the unexplained 'step' parameter, which an agent cannot reason about from either schema or description.

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 0%, so the description must carry parameter meaning. It partially explains 'slug' by describing the fallback when the slug is absent or unavailable, but the 'step' enum (overview/setup) is never mentioned, leaving one of two parameters completely undefined.

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 concrete verb-and-resource pair: it returns an absolute onboardingUrl for a presetup, with a defined fallback to the overview. An agent can tell it produces a link rather than installing anything, which separates it from presetup_install_inactive, though it never names sibling tools explicitly.

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 gives a clear trigger ('Use when a person needs the Spaces setup page') plus an operational constraint ('Do not install a presetup without the person') and a presentation rule ('Show the link to the person'). It stops short of naming alternatives such as presetup_get or presetup_find, so the routing to siblings remains implied.

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