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

No annotations are provided, so the description carries the full behavioral-disclosure burden. It names data categories (prices, caps, trial rule) but does not say whether the operation is read-only, whether prices are current or authoritative, whether permissions are required, or what the response shape looks like.

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 description is a single terse fragment with no filler, and it front-loads 'Exact prices.' However, the lack of a complete sentence or verb makes the structure less clear than it could be for an agent.

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 tool with no annotations and no output schema, the description is minimally adequate: it names the main data categories returned. It still omits return format, whether values are current, and any usage constraints, so it is not fully complete.

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 tool takes zero parameters, so there is no parameter semantics to explain beyond the baseline. The description does not need to document input arguments.

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 fragment 'Exact prices, plan caps and the one-time trial rule' identifies the content domain, but it does not state an action (lookup, calculate, retrieve) or a return mechanism. It also does not clearly distinguish this tool from siblings like continuity_limits and continuity_floors, which may also involve caps or pricing boundaries.

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?

There is no guidance on when to use this tool versus continuity_account, continuity_limits, continuity_floors, or the other siblings. No exclusions, prerequisites, or alternative-routing instructions are provided.

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