join-with-invite

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

No annotations are provided, so the description carries full burden. It states the action ('join') but doesn't disclose behavioral traits: it doesn't specify if this is a read-only or mutating operation (likely mutating), what happens on success (e.g., access granted, role assigned), error conditions (e.g., invalid code, full room), or side effects. The description is minimal and lacks critical context for a mutation tool.

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 extremely concise with a single, direct sentence: 'join a room with an invite code'. It is front-loaded with the core action and uses no unnecessary words. Every part of the sentence earns its place by specifying the verb, target, and mechanism.

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 tool likely performs a mutation (joining a room) with no annotations, no output schema, and low parameter coverage, the description is incomplete. It lacks information on outcomes, errors, prerequisites, and behavioral details. For a tool that changes state, this minimal description is inadequate to guide an agent effectively.

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 0%, so the description must compensate. It mentions 'invite code' which relates to the 'invite' parameter, adding semantic meaning beyond the schema's type definition. However, it doesn't explain the parameter's format, source, or constraints (e.g., length, expiration), leaving significant gaps. With one undocumented parameter, this adds only marginal value.

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 target resource ('a room') using the mechanism 'with an invite code'. It distinguishes from siblings like 'create-room-as-host' (creation vs joining) and 'exit-room' (joining vs leaving). However, it doesn't specify what 'join' entails (e.g., becoming a participant, gaining access) beyond the basic verb.

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 provides no guidance on when to use this tool versus alternatives. It doesn't mention prerequisites (e.g., needing an invite code), when not to use it (e.g., if already in the room), or compare it to siblings like 'create-room-as-host' for when you should create instead of join. Usage is implied by the name but not explicitly stated.

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