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

With no annotations, the description carries the full burden. It usefully discloses that funds come from the existing game balance, that this is not real money, and that confirmation is required, but it does not state irreversibility, immediate balance deduction, failure behavior, or any rate limits. This is adequate but leaves meaningful behavioral gaps for a money-transfer mutation.

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 description is compact and front-loaded, stating the primary action first, then the exclusion and alternative, then the confirmation requirement. Each clause earns its place and there is no redundant restatement of the schema.

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 mutation tool with no annotations and no output schema, the description covers purpose, exclusion, alternative tool, and a confirmation safeguard. However, it omits consequences such as irreversible transfer or what happens on insufficient balance, leaving the agent without important operational context.

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 description coverage is 100%, so all four parameters are already documented in the schema. The description highlights the two required parameters via the confirmation instruction but adds no syntax or format detail beyond what the schema provides, so baseline 3 applies.

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: sending in-game naira from the player's existing game balance to another player. It also names the alternative tool purchase_discounted_credits for a different money-related action, so the agent can distinguish it from siblings without opening the schema.

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?

Explicitly says this is NOT a real-money top-up and directs the agent to use purchase_discounted_credits for Nova discounted wallet shop, covering when-not-to-use and naming the alternative. It also adds a clear prerequisite: confirm recipient id and amount with the user first.

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