get_coin_balance

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

No annotations provided, so the description carries the full burden. It describes a read-only operation implicitly ('Get'), but does not explicitly state it is non-destructive or mention any permissions needed. Adequate but could be more transparent.

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?

Three sentences with no wasted words. Front-loaded with the action and resource. Every sentence adds value: purpose, context, and usefulness.

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 simple zero-parameter getter, the description is complete. Explains what the tool does and why to use it. Could optionally specify what 'currency information' includes, but not necessary.

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?

Input schema has zero parameters, so there is nothing to describe beyond what the schema already provides. Baseline 4 is appropriate; description adds no parameter info but is not required.

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?

Clearly states 'Get your current coin balance and currency information' with a specific verb and resource. Explains that coins are in-game currency used for shop purchases, differentiating it from sibling tools that deal with tasks, achievements, etc.

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?

Provides context: 'Useful for planning purchases and understanding your economy.' This gives a clear when-to-use scenario. However, it does not explicitly mention when not to use it or suggest alternatives, though the tool is sufficiently unique among siblings.

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