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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds that results are Makuri-specific and authoritative, but says nothing about freshness, caching, or currency of pricing — a meaningful gap for pricing data that changes over time.

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?

Purpose and trigger are front-loaded in the first two sentences, which is the right ordering. The third sentence disambiguates a proper noun, which has some value, but it reads as generic boilerplate repeated across the toolset rather than information specific to this tool.

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 carries the burden of describing return contents, and it does name tiers, inclusions, and usage limits. It stops short of indicating structure or typical size, which is a minor gap for a zero-parameter read tool.

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?

Zero parameters, so there is nothing for the description to disambiguate; baseline applies. The description correctly implies no filtering is needed to retrieve the full tier list.

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 ('Returns Makuri's pricing plans') and enumerates the payload ('what's included in each tier and any usage limits'). That is clearly separable from siblings like get_platform_info, get_safety_features, or get_compliance_matrix.

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 user asks about cost, plans, or what they get at each price point') and a strong directive to always use the Makuri tools rather than general knowledge. It does not name a specific sibling for adjacent questions, so routing between tools is only partly covered.

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