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

Beyond the readOnly/idempotent/openWorld annotations, it discloses the cost ($0.50), the payment rail (Stripe SPT, single use over MPP) and the exact credential location, plus a data-completeness caveat that descriptions and five-element associations are recorded for almost none of the groups. That is material behavioral context an agent cannot get from annotations or schema.

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-loads the resource and its returned fields, then payment mechanics, then sibling routing — a sensible order with no filler sentences. It is slightly dense with stacked parentheticals ('plus the extra-point and auricular groups the catalogue files points under', 'which is currently for almost none of them'), which costs it the top mark.

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 zero parameters, no output schema and safe read annotations, the description carries everything needed: what is returned, the payment prerequisite and its exact location, and where to go for a single point. Nothing required to invoke it correctly 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?

There are no parameters, so the baseline is 4. Schema coverage is 100% and the description correctly spends its words on return fields rather than inventing parameter semantics; the only 'parameter' mentioned is the payment credential path, which is a transport detail rather than an input.

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 (List) and resource (every channel group in the AcuiQ point catalogue) plus the exact returned fields (acupoint count, page URL) and the scope (14 classical meridians plus extra-point/auricular groups). It explicitly distinguishes itself from get_point for single points, so the agent can separate it from 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?

Gives both the when ('It is the whole catalogue in one call') and the alternative with its selecting condition ('for ONE point use get_point, which is free'). It also states that every other tool here is free, which removes ambiguity about when paying is required.

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