Create Channel Collaborator

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

Beyond the annotations (destructiveHint, openWorldHint, idempotentHint=false), the description discloses that a new contact may be created as a side effect, that confirm=true is mandatory for the mutation, the exact permission scopes needed, the delegate-to-contact authorization path, and that the action may share access, notify people, or incur provider charges. This is unusually rich behavioral disclosure.

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 core action is front-loaded in the opening sentence, and the permission/confirmation details are neatly sectioned. The permission block is long but carries real authorization information, so little is wasted.

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 7-parameter mutation with a nested payload object and no output schema, the description covers the action, preconditions, and external effects well. It does not discuss the payload/payload_file alternates, but the schema documents those at full coverage, so the gap is minor.

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 every parameter is already documented in the schema. The description only restates the email/role semantics and confirm requirement, adding no syntax or format detail beyond what is structured. Baseline 3 applies.

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 first sentence gives a specific verb (invites), resource (collaborator to a channel), and the key inputs (email, role), plus a non-obvious side effect (creates a contact if none exists). This clearly distinguishes it from siblings like delete_channel_collaborator, list_channel_collaborators, and create_webinar_collaborator.

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?

It documents the required permission scopes and the confirm=true requirement, which is useful precondition context, but it never states when to choose this tool over alternatives (e.g., invite_contacts or create_webinar_collaborator) or when not to use it. Usage is implied rather than guided.

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