whatsapp_set_group_picture

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

No annotations exist, so the description must compensate. It only states the action without disclosing side effects, authorization requirements, or constraints (e.g., image format or size limits). The description adds minimal behavioral context.

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 concise sentence with no wasted words. The verb 'Set' is front-loaded, making the action immediately clear.

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?

Given the lack of annotations and output schema, the description should provide more operational context (e.g., permissions, side effects, or prerequisites). It is too sparse to fully inform an agent's decision.

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 input schema already describes both parameters (id and data) with 100% coverage. The description does not add any additional meaning or clarification beyond the schema, so it meets the baseline expectation.

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 action ('Set') and the resource ('group profile picture'), making the tool's purpose unambiguous. It effectively distinguishes from sibling tools like 'whatsapp_set_community_picture' or other group settings.

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. For instance, it doesn't mention that the user needs admin permissions or that this replaces the current picture. With many sibling tools, such context is essential.

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