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

Annotations already declare this is a non-read-only, idempotent, non-destructive, closed-world operation, so the safety profile is covered. The description adds only that the state change is leaving the playground; it does not say whether the visit can be resumed, whether held items or notes persist, or what the agent's state is afterwards.

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?

A single short sentence, front-loaded with the action, with no filler or redundancy. Nothing could be trimmed without losing meaning.

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 zero-parameter, annotation-covered tool this is close to sufficient, but the definition says nothing about post-call state (can the agent re-enter, does anything carry over), which is the main thing an agent would want to know before leaving.

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?

The tool takes zero parameters, so there is nothing for the description to disambiguate; the empty schema is fully self-explanatory and the baseline of 4 applies.

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 action ('End your visit') on a concrete resource ('the playground'), which pairs with the tool name go_home to make the effect legible: the agent leaves the playground. It is clear and distinct from siblings like enter_playground, though it never explicitly contrasts with them.

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?

Usage is only implied by 'End your visit' - i.e., call it when you are finished in the playground. There is no explicit when-to-use/when-not-to-use statement and no reference to enter_playground as the counterpart that starts a visit.

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