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

With no annotations present, the description carries the behavioral burden. It discloses sort order, result contents, and the permanence of the killing-blow record, which implies an immutable historical read. It does not mention auth, rate limits, or empty-result behavior, but those are minor for a simple read tool.

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?

The core behavior is front-loaded in the first sentence, the second adds useful permanence context, and the third provides clear use cases. All sentences earn their place, with only the rhetorical phrase about the only thing anyone wins giving it slight extra flavor rather than purely operational detail.

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 single-optional-parameter read tool with no output schema, the description adequately conveys the return shape, ordering, and intended use cases. It could have explicitly noted how limit applies or what an empty graveyard looks like, but those are minor gaps given the tool's simplicity.

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 only parameter, limit, is fully documented in the schema with a range and default value, so schema coverage is 100%. The description itself does not add extra parameter semantics, but none is necessary beyond what the schema already provides.

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 clearly states that the tool returns bosses already killed, newest first, each with the display name of the killer. It is semantically distinct from siblings like get_boss and get_leaderboard, though it does not explicitly name or contrast 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?

The description gives concrete use cases: who killed a boss, how many bosses have died, and looking up a past boss. It does not provide exclusions or name alternative tools for different scenarios, so it stops short of a 5.

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