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

Annotations already declare readOnlyHint=true and openWorldHint=false; the description goes further by asserting 'Creates nothing' and that the person decides whether to make an account, which pre-empts an agent's worry about side effects or sign-up obligations. It does not describe the link's lifetime, format, or any rate limits, so it falls short of 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?

Two tight sentences with the core behavior front-loaded and the no-side-effects caveat immediately after. Minor redundancy in 'opens ... for the person to open themselves', but nothing extraneous.

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 four optional parameters, no output schema, and zero required fields, the description should clarify what the returned link looks like and which parameter combination produces a valid link. It covers the safety profile but leaves input-combination rules and return shape unaddressed.

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 50%: city and place are documented, lat/lon are not. The description hints at the two input modes ('a city or location') but never says how lat/lon combine, whether one mode overrides the other, or what place does for a lat/lon pair. Baseline 3 for partial coverage with only marginal added meaning.

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 uses a concrete construction (returns a link that opens the garden planner pre-set to a city or location) rather than restating the name. An agent can tell this produces a navigational URL, not data. It stops short of explicitly contrasting with siblings like get_city_guide or find_city.

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?

'for the person to open themselves' implies the hand-off-to-human use case, which is useful context for choosing this over a data-returning sibling. But there is no explicit when-to-use/when-not statement and no guidance on choosing it over get_city_guide or find_city.

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