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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint, and destructiveHint=false, so the safety profile is covered. The description adds genuinely new context: the $0.01 USDC x402 payment cost and the fact that supplying state improves matching accuracy. These are real behavioral details, but there is no disclosure of failure behavior or return format, so a 3 is right.

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 transformation, followed by the usage hint and cost note. No filler, no repetition of the tool name.

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 simple read-only transformation tool with full schema coverage and annotations, the description supplies what's needed: what it does, when to use it, and cost. The only minor gap is that it never says what the response looks like, though the input schema suggests the return is the standardized city name.

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 city, state, and algorithm. The description only reinforces that state is optional but improves accuracy, and never mentions the algorithm parameter at all. Baseline 3 is appropriate when the schema carries the load.

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+resource: converts abbreviations, nicknames, alternate spellings to the standard city name, with concrete examples ('San Fran', 'L.A.'). This clearly separates it from other Interzoid standardizers such as country_standard, state_abbreviation, and org_standard.

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?

Names use cases (address cleansing, geocoding preparation, consistent reporting) which gives the agent clear context for when to reach for this tool. It stops short of naming alternatives or stating when not to use it, so it falls short of a 5.

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