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

With no annotations, the description does carry real behavioral load: it discloses that the operation is 'unsigned' (a prep step, not an execution) and that each mode consumes a specific item (one Red Line or one Nano Salve) plus the exact effect applied. However, it says nothing about wallet/permission requirements or what the prepared output/response looks like.

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 dense sentence, front-loaded with the domain ('Fight Club: prepare') and using the colon to enumerate the two modes. No filler; it is a run-on but every clause adds information.

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 3-param, no-annotation, no-output-schema mutation-prep tool, the description covers purpose and item effects well but omits wallet/auth meaning and how this fits the larger prepare→claim→settle flow. Adequate but with clear gaps an agent would want filled.

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 0%, so the description must compensate. It fully explains the item enum's two values and their effects and implies fighterId via 'one of your fighters', but leaves the wallet parameter entirely undocumented in both schema and description.

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 (prepare/use) and resource (an item on one of your fighters) and enumerates both item modes with their effects, so an agent knows exactly what the tool does. It does not explicitly route to sibling tools like prepare_fight_settle or prepare_fight_claim, so it stops short of full sibling differentiation.

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 parenthetical '(unsigned)' hints that this is a transaction-preparation step, but there is no explicit statement of when to call this versus prepare_fight_claim/prepare_fight_settle or what must precede it. Alternatives and preconditions are left to inference.

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