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

Annotations already declare readOnlyHint=true, destructiveHint=false, openWorldHint=false, so safety is covered. The description adds substantive behavioral context the annotations cannot: it discloses the payload shape (stats, play flags, window look, per-character values and starts) and clarifies the world-level vs story-level scope of the data.

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?

Front-loaded with the purpose in the first clause, and the density is justified by the absence of an output schema. The first sentence is long and comma-heavy, but nearly every clause carries new information about the return payload.

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 correctly takes on the burden of describing return contents in detail and adds a clear scoping rule plus a sequencing hint toward the setter siblings. The remaining gap is parameter documentation, which is left entirely to the schema.

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?

Only worldId is documented in the schema (50% coverage); slug has no description anywhere. The description does not mention either parameter, so it does nothing to compensate for the uncovered slug field or to explain how slug and worldId relate.

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 ('Read a world's Status setup') and then enumerates exactly what the setup contains: the RPG-style stats (max 6), which ones play, why one does not, the window look, and per-character values/start. It also implicitly distinguishes itself from get_story_status by clarifying that 'Status values live per story; this is the setup every story of the world uses.'

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 explicit sequencing guidance: 'Use it before set_world_status or set_status_start,' naming the two write-side siblings. It does not explicitly state when to prefer get_story_status instead, but the world-vs-story scoping sentence makes that inference easy.

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