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

Annotations already declare readOnlyHint, idempotentHint and openWorldHint=false, so safety is covered. The description adds real behavioral context beyond them: the default no-name behavior returns index plus formulas, and the tool mirrors the agentickingdoms:// resources. It does not mention response size or pagination, so not 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?

Purpose and default behavior are front-loaded, and the long semicolon-delimited enumeration is dense but each item is a legitimate valid value. It is longer than ideal for a single-parameter tool, but little of it is 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?

With an output schema present, return values need not be described. Combined with annotations covering the safety profile, the description supplies everything an agent needs: the default behavior, the full valid value set, and the pointer to player-actions for command payloads.

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 already 100%, but the description goes beyond the schema's example-based hint by exhaustively enumerating every valid data set and doc name plus the text-en option and the empty-name default. That converts a free-form string into a practically enumerable set of choices.

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 the game's data and docs') and immediately disambiguates the three modes (resource mirror, data set, doc, text-en). It also tells the agent that player-actions carries every command's payload shape, distinguishing it from the mutating siblings like send_command.

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 the selection rule explicitly: no name returns the index plus formulas, a name returns a specific data set/doc/text-en, and player-actions is where command payload shapes live. It lacks an explicit 'when not to use / use send_command instead' sentence, but the routing is clear enough.

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