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

The description adds meaningful behavioral context: it explicitly states the city is not decorative and that every venue settles on-chain in APEX/nonce. However, with no annotations, it still does not state whether calling this tool is read-only, whether endpoints require subsequent actions, or what the returned data actually 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?

Two brief sentences with no fluff. The first sentence states what the tool provides, and the second adds a meaningful on-chain settlement qualifier without repeating the name or schema.

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 list tool, this is functionally complete: an agent knows what it returns and the important semantic constraint that every venue settles in APEX. It would benefit from explicitly stating the return format or read-only nature, but nothing essential is missing for selecting and invoking it.

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?

This tool has no parametersable, and the description makes that unnecessary. It does not mislead about arguments, and the schema already confirms an empty parameter set.

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?

Clearly identifies the resource: places in Citizens City where an agent can actually spend, plus the endpoint for each venue. The key detail that these are functional, spendable venues rather than scenery distinguishes it from generic location or lore tools, though it is phrased as a noun fragment rather than an explicit imperative like 'Returns...'.

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?

No explicit guidance on when to choose this over siblings such as catalog_browse, agora_list, or service_market. The phrase 'an agent can actually spend at' implies a use case, but the description never states when to use it, when not to, or how it relates to alternatives.

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