updatePlayerData

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

With no annotations, the description must carry the full burden of behavioral disclosure. It only states 'Update' without detailing whether the update is a full replacement, partial merge, requires authentication, or what the return value is. The examples provide a small insight into content but not behavior.

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 a single, front-loaded sentence with no filler. It efficiently conveys the core purpose and examples in under 10 words.

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?

Despite having only one parameter, the description lacks crucial details for a mutation: no behavior semantics (full vs partial update), no return value, no usage prerequisites, and the JSON structure is only vaguely hinted with 'etc.' The absence of annotations and output schema makes this incomplete.

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 schema defines a single param (playerData) as 'Stringified JSON of player data structure'. The description adds meaningful context by suggesting the JSON contains 'equipment, settings, etc.', giving the agent a clearer idea of what data to pass. This goes beyond the schema's vague 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?

The description clearly states the tool 'Update player profile data' with examples (equipment, settings), specifying the verb and resource. It is distinct from sibling get/mutation tools in that it's the only one targeting player profile data, though it does not explicitly differentiate itself.

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?

No guidance is provided on when to use this tool versus alternatives. The description merely states the action without any context, use cases, or exclusions, so the agent is left to infer from the name alone.

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