vibo_join_event

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

Description notes it is 'Confirm-gated' and returns the event's id, adding behavioral context beyond the readOnlyHint annotation (false). No contradictions.

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?

Extremely concise: two short sentences conveying purpose, usage, and behavior with no wasted 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?

For a simple join action, it covers the return value and confirmation gate. Without an output schema, the return info is adequate. Could mention error cases (e.g., already joined) 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?

Schema coverage is 100%, so baseline is 3. Description reiterates the link format and confirm behavior but adds minimal new information beyond the schema.

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 an event') and the resource ('event') via a specific mechanism ('share link or hash'). It is distinct from siblings like 'vibo_leave_event'.

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 on when to use (when you have a share link/hash) and gives an example URL. Does not explicitly state when not to use, but the purpose is clear.

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