Create a WhatsApp group

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

The description adds value beyond annotations by disclosing that the linked account becomes owner and that each participant returns a status (ok, invite_needed, or failed). This explains behavioral outcomes and per-participant results, which the annotations (readOnlyHint=false, idempotentHint=false, etc.) do not cover. No contradiction with annotations.

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 two sentences, front-loaded with the primary action, and efficiently conveys the owner assignment and participant statuses. Every sentence earns its place with no redundant 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?

Given there is no output schema, the description explains return values via participant statuses and mentions owner assignment. However, it does not clarify whether the group is created if all participants fail, or if the operation is atomic, leaving some edge-case ambiguity. Overall, it is fairly complete for a creation tool.

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 provides full descriptions for both parameters (name and participant_ids), so the description adds no additional parameter-specific meaning. It only restates that the tool takes a name and participants, which is already covered by the schema. Baseline of 3 is appropriate given high schema coverage.

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 creates a WhatsApp group with a name and participants, and specifies that the linked account becomes owner. This distinguishes it from siblings like manage_group, which likely handles existing groups. The verb and resource are specific and unambiguous.

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 description does not explicitly state when to use this tool versus alternatives such as manage_group or send_message. The purpose is clear enough to infer creation, but there is no guidance on when not to use it or when to prefer another tool for similar operations.

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