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

Annotations already declare readOnlyHint=true, so the safety profile is covered. The description adds genuinely useful behavior — the result is scoped to events since the last call and entries flagged inYourRoom occurred in the user's own room while they were elsewhere — but it omits whether calling it resets that cursor or whether anything is lost if it is not called.

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?

It is compact, but the evasive phrasing ("each dollar you collected," "your reward for coming back") forces the reader to decode simple concepts like earnings and a daily bonus. The first clause is front-loaded with the key scoping rule, which helps, but the second sentence about inYourRoom is dense and would be clearer as a definition.

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 parameters and no output schema, the description carries the full burden of describing the return value, and it only partially does so: it names the event categories and explains one flag, but says nothing about ordering, volume, or structure of the returned events.

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 no parameter meaning to convey and the baseline of 4 applies. The description correctly avoids inventing parameters and instead spends its words on what the result contains.

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 conveys that this returns a recap of events since the last invocation, and it enumerates content categories (speech, arrivals, departures, trips, builds, earnings). However, it never states a clear verb or explicitly frames the tool as a read/summary feed, and it does not distinguish itself from siblings like look or inventory, leaving the agent to infer the boundary.

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?

There is no when-to-use guidance and no alternatives named, even though look, inventory, and room_settings overlap in subject matter. The phrase "since you last asked" hints at a polling cadence but never says to call it on login, after being away, or instead of manually inspecting the world.

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