Create Webinar Registration

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

Even though annotations already flag this as a destructive, non-idempotent, open-world mutation, the description adds substantial context: it explains the return values (unique visitor key and personalized webinar URL), the required API permissions, the need for confirm=true, and potential side effects such as sharing access, notifying people, or incurring provider charges.

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 front-loaded with the core action and return value, followed by permission and confirm details. It is well-structured, though the permission callout block is slightly verbose and could be tightened without losing meaning.

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 mutation tool with 8 parameters, nested objects, no output schema, and rich annotations, the description covers the missing pieces: return value shape, authorization requirements, confirmation requirement, and side effects. An agent has everything needed to invoke it correctly.

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 parameter semantics are fully documented in the schema. The description only repeats the registrant fields (email, first name, last name) and adds no extra syntax, format, or constraint information beyond what the schema already 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: 'Register a person for a webinar'. It is clearly distinct from siblings like create_webinar, list_webinar_registrations, and update_webinar, leaving no ambiguity about what the tool does.

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 explains what to provide (email, first name, last name) but gives no explicit guidance on when to use this tool versus alternatives, nor any when-not conditions or prerequisites beyond the permission and confirm requirements that appear later.

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