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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds genuine context beyond that: OAuth is required, results are paged via cursor/listingId, and the fields returned are named. It stops short of stating result ordering or maximum page behavior, which keeps it from a 5.

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?

Five short sentences, front-loaded with the trigger, then the filter, then the return shape, then the sibling handoff, then the auth requirement. Nothing repeats the name or the annotations, and every sentence carries usable information.

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 three-parameter read tool, the description covers trigger, filtering, paging continuation, sibling routing, auth, and even lists the returned fields despite an output schema existing. An agent can call it correctly without further context.

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 33%: cursor is documented in the schema, but limit and listingId have no description there. The description compensates for the important one, explaining that listingId pages the lists that contain one owned listing, and the paging intent of limit/cursor is implied by 'page the lists'. limit's bounds are still left entirely to the schema, so it is not fully compensating.

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 ('browse their catalog lists') and adds a second use ('resolve a list name to an id'), which an agent can act on directly. It is clearly distinguished from daylily.list_listings, which is named as the tool for paging a list's members.

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?

Gives an explicit trigger ('when the signed-in user asks to browse... or resolve a list name to an id') and names the alternative tool plus the condition that selects it ('Use daylily.list_listings with listId to page a list's members'). The listingId filter case is also spelled out as a usage path.

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