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

With no annotations, the description carries the full burden and does well: it discloses a non-obvious side effect (returning a Stripe Checkout link instead of simply flipping visibility) and a consent requirement ('Ask the person first'). It still omits reversibility, permission requirements, and error behavior, keeping it 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?

Three sentences, each carrying distinct load: what the tool toggles, the consent instruction, and the payment edge case. The primary purpose and the public/private semantics are front-loaded with no filler.

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 two-param mutation tool with no annotations and no output schema, the description supplies the critical missing context: the side-effect return value and the consent requirement. Only permission/error behavior is unaddressed, which is a minor gap.

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%: space_id is documented in the schema, but the 'public' boolean is bare. The description compensates by defining exactly what each boolean value means ('anyone with the link' vs 'only the owner'), adding real meaning beyond the schema.

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+resource ('Makes a ready space public... or private') and defines both target states inline ('anyone with the link' vs 'only the owner'). No sibling tool in the list overlaps with visibility toggling, so the agent can route here unambiguously.

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 one behavioral precondition ('Ask the person first') and a state precondition ('a ready space', 'until hosting starts'), which implies when the tool applies. However it never states when not to use it or names an alternative path, so usage is only partially guided.

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