waha_join_group

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

With no annotations provided, the description carries full burden but only states the basic action. It doesn't disclose behavioral traits such as whether joining requires authentication, if it's idempotent (e.g., joining an already-joined group), potential rate limits, error conditions (e.g., invalid code), or what happens on success (e.g., group added to chats).

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, efficient sentence with zero waste—it directly states the tool's purpose without redundancy. It's appropriately sized for a simple tool with one parameter and is front-loaded with essential 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 no annotations and no output schema, the description is incomplete for a mutation tool. It lacks details on behavioral context (e.g., side effects, error handling) and what the tool returns, leaving gaps that could hinder an AI agent's correct invocation.

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 the schema already documents the single 'code' parameter with examples. The description adds no additional meaning beyond implying the parameter is required for joining, which is already clear from the schema's required field. Baseline 3 is appropriate as the schema does the heavy lifting.

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 ('Join') and resource ('a group'), specifying it uses 'invite code/link'. It distinguishes from siblings like 'waha_create_group' (creating new groups) and 'waha_leave_group' (leaving groups), but doesn't explicitly contrast with other group-related tools like 'waha_get_group_invite_code'.

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. It doesn't mention prerequisites (e.g., needing an invite code), exclusions (e.g., cannot join if already a member), or when to choose other tools like 'waha_create_group' for new groups or 'waha_get_group_invite_code' to obtain codes.

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