mailkite_update_list

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

Annotations already indicate this is not read-only, not idempotent, and not destructive. The description adds the useful authentication requirement ('Requires a management session token'), but does not disclose any potential side effects of renaming a list, such as impacts on references or subscribers.

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 two short, purposeful sentences with the action stated first and the authentication prerequisite second. There is no verbose or redundant content; every word earns its place.

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?

This is a simple two-parameter rename operation; the action statement plus the token requirement cover the essential context. While explicit details about the 'name' parameter and return value are absent, they are not critical for such a straightforward tool and the description is reasonably complete.

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 coverage is only 50% (id described, name not). The description's verb 'rename' implies that 'name' is the new list name, which adds partial meaning not present in the schema. It does not explicitly describe either parameter, so the gap is only partially compensated.

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 uses a specific verb ('Rename') and a specific resource ('a contact list'), which unambiguously states the tool's purpose. This distinguishes it from siblings like create_list, get_list, delete_list, and update_broadcast without needing to open their schemas.

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 action 'Rename a contact list' implies the usage context, and the token requirement adds a precondition. However, there is no explicit guidance about when to use this tool versus alternatives, nor any exclusions for similar update operations among the many siblings.

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