Create Webinar Collaborator

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

Annotations already declare destructiveHint, openWorldHint, and non-idempotency, but the description adds substantial context beyond them: a new contact is created as a side effect if the email is unknown, specific token permission requirements are listed, delegate-token behavior is explained, and the confirm=true requirement and possible charges/notifications are disclosed. This is a rich behavioral profile, though some of the closing warnings read as generic boilerplate.

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 opening purpose sentence and the viewer constraint are well front-loaded, but the multi-line permission block is verbose template-style content that inflates the description, and the email side-effect is duplicated from the schema. Efficient in parts, padded in others.

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 mutating, nested-schema tool with annotations present and no output schema, the description covers the key gaps an agent needs: side effects, auth/permission requirements, the confirm gate, and collaborator eligibility. Only minor gaps (return behavior, relationship to sibling collaborator tools) remain.

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 email, account, confirm, payload, webinar_id, and payload_file. The description restates the email side effect but adds no syntax or format detail beyond the schema. Baseline 3 is appropriate when 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?

States a specific verb+resource (invites a collaborator/producer to a webinar) via email, immediately distinguishing it from siblings like create_channel_collaborator and delete_webinar_collaborator. The scope constraint ('viewers cannot be webinar collaborators') further sharpens the intent.

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?

Gives clear context: use to invite a producer by email, requires confirm=true, and specifies viewers are excluded as collaborators. It does not explicitly route the agent against alternative siblings (e.g. invite_contacts or channel collaborators), so it stops short of full when/when-not guidance.

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