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

The annotations already establish that this is a safe, idempotent read, so the description only needs to add context, which it does by stating that the rows match exactly what the Support page renders and cannot drift apart, and by disclosing the cost and quota profile of calling the tool. It does not describe the fields each row contains, but it goes well beyond restating the annotations.

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?

The opening two sentences are tight and front-loaded. The trailing pricing block is a raw JSON fragment pasted into prose; it is machine metadata about the call rather than about Support plans, so it sits awkwardly and could be misread as saying the plans themselves cost $0 per call.

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 zero-parameter read tool with no output schema, the description supplies what the call returns (per-plan price and inclusions) and a consistency guarantee. It could say a little more about the shape of a row, but nothing essential is missing for correct invocation.

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?

The input schema is empty, so there are no parameters whose meaning needs explaining. By the stated baseline, a tool with zero parameters receives a 4 here.

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?

The description uses a specific verb and resource: it returns each Support plan together with its monthly price and what the plan includes. That is concrete enough to distinguish it from a generic plans or pricing tool, but it never names which sibling to prefer when the agent needs general plans or price tiers.

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 only implied: the tool is for Support plan details, and the note that volume pricing lives at an external URL hints that this tool is not the place to answer broader pricing questions. There is no explicit when-to-use or when-not-to-use guidance relative to myaiceo_plans or myaiceo_pricing.

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