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

Annotations already declare readOnlyHint=true, destructiveHint=false, openWorldHint=true, so the safety profile is covered. The description adds genuinely useful behavior the annotations cannot convey: required app enablement, the permission/role gate, and the API-key scope. It does not disclose pagination or rate limits, but what it adds is substantive.

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?

Front-loaded with the core meaning, but the first two sentences are near-duplicates ('Intelligent Waitlist entries for a day, with the openings Mangomint found for each' vs. 'Returns the waitlist entries for one day with the openings Mangomint found for each'), wasting budget. The trailing 'Cotlet API key' sentence is also generic boilerplate.

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?

With no output schema, the description steps in and characterizes the return (entries plus matched openings), and it covers setup prerequisites and the downstream booking handoff. The redundancy noted above is the main defect; nothing essential for calling the tool is missing.

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 the schema already documents both 'date' and 'location_id' (including the default). The description only implies the day-scoping tied to 'date' and cites entry_id/opening_id, which are not parameters of this tool. Baseline 3 is correct.

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 ('list' + 'Intelligent Waitlist entries') plus scope ('for a day') and even the content of the return ('with the openings Mangomint found for each'). An agent can immediately distinguish this read of waitlist entries from siblings like list_appointments or book_from_waitlist.

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?

Useful prerequisites ('Intelligent Waitlist app enabled', 'Admin user or the Can manage waitlist permission') and a clear handoff ('Pass entry_id and opening_id to book_from_waitlist'). However, it never contrasts with alternatives such as list_appointments or when this tool is not the right choice, so usage is implied rather than specified.

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