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

The annotations already declare that this is a non-read-only, open-world, non-idempotent operation. The description adds useful recipient-side behavior: the link opens in any browser without an account or download, and Meetful can email it to up to 10 addresses.

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 three short sentences with the core action front-loaded. Each sentence contributes useful information: the action and return value, recipient accessibility, and email invitation capability.

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?

The definition is complete for a simple meeting-creation tool with fully described parameters and no output schema. It explains the return link and recipient behavior, though it does not cover meeting lifecycle, link expiry, or creation authentication.

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 all parameters are already documented in the input schema. The description reinforces the invite email capacity but does not add meaning for mode, about, or topics beyond what the schema provides.

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 states a specific verb and resource: it "Starts a new Meetful video meeting" and returns the link. It clearly distinguishes creating a meeting from joining an existing one by using "new," though it does not explicitly name a sibling alternative.

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?

Usage is implied by the action of starting a new meeting, but there is no explicit guidance about when to use this instead of join_meeting or book_time. No exclusions or prerequisites are stated beyond the schema's invite sign-in requirement.

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