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

Annotations already declare destructiveHint=true, idempotentHint=false and openWorldHint=true, so the safety profile is known. The description adds only the round-robin scoping constraint; it says nothing about whether the previous host is notified, whether calendar invites are regenerated, or what the 'reason' is used for.

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?

A single sentence with the core verb and scope front-loaded and no filler. It is efficient, though its brevity leaves obvious behavioral questions unaddressed rather than merely avoiding verbosity.

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 destructive mutation with no output schema, and the description does not explain side effects such as notifications to the former host, calendar/ICS updates, or what happens to the booking's existing attendee assignments. Nor does it state prerequisites, like the booking needing to be a round-robin booking, which is essential for avoiding a failed or destructive call.

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 100%, so all three parameters are already documented, and the parenthetical about memberId being the userId from list_members largely repeats the schema text. The optional 'reason' parameter is not discussed in the description at all, so no meaning is added beyond the schema.

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 and resource ('Reassign a round-robin booking') and names the target ('a specific team member'), so the agent knows exactly what operation is performed. It does not, however, distinguish itself from the sibling tool 'reassign_booking', leaving the fine-grained difference between the two unresolved.

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?

Use is implied by the qualifier 'round-robin booking', which scopes the tool to that booking type. There is no explicit when-to-use or when-not-to-use guidance and no pointer to the closely named sibling 'reassign_booking', so the agent must infer the boundary.

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