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

Annotations already declare the side-effect profile (readOnly=false, destructive=false, idempotent=false), so the bar is lower. The description adds genuinely useful context beyond that: the wishlist is created empty and privacy settings (PIN, reservations, guest items) hold safe defaults and are not configurable through this tool.

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?

Two short sentences, front-loaded with the core action and no filler. The second sentence is slightly tangential to the actual parameter set but does prevent futile configuration attempts, so it still earns most of its space.

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?

Adequate for a simple create tool with clear annotations and no output schema, but it says nothing about what is returned, whether the title must be unique, or how theme changes the result — the parameter surface is entirely undocumented in prose.

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 0% across all three parameters (title, theme, description), and the description names none of them — it instead discusses privacy settings that aren't even parameters. The enum of seven themes and the title/description length limits are left entirely to the schema, so the description does not compensate for the coverage gap.

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+resource ('Creates a new, empty wishlist') and the word 'empty' distinguishes it from sibling add_items/update_item, which operate on existing wishes. An agent can select this over the other six siblings without opening a schema.

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 'empty' (populate later via add_items) and by the note that privacy settings can only be changed in the app, which is a soft when-not. However, no alternative is named and no explicit when-to-use condition or prerequisite (e.g. auth/limit) is stated.

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