Yenta Directory

List cities

list_cities

Read-onlyIdempotent

List the cities that have at least one published venue.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`limit`	No	Maximum number of items to return.
`cursor`	No	Number of items to skip; pass `next_cursor` from the previous page.

Output Schema

TableJSON Schema

Name	Required	Description
`item`	No
`items`	No
`reason`	No
`sample`	No
`source`	No	FR-13: which approved revision an answer was read from, and how fresh. ``source`` is ``approved-content-revision:<id>`` for every read that answers from one venue, and the literal ``directory`` for the two cross-venue reads, which have no single revision to cite.
`status`	Yes
`pagination`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedSep 23, 2026

addedOutput schema / properties / sample

Added value: +{
+  "anyOf": [
+    {
+      "type": "boolean"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "default": null,
+  "title": "Sample"
+}

First observedSep 10, 2026

TDQS

A3.9/5.0

Behavior3/5

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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint, so the safety profile is covered. The description adds the 'at least one published venue' filter, which is useful, but it does not disclose behaviors like ordering, pagination semantics, or handling of cities without venues. Given the annotation coverage, this is adequate but not rich.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

A single sentence that is front-loaded with the verb and resource, and adds the key filtering constraint without any filler. Every word earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple read-only list tool with optional parameters, full schema coverage, an output schema, and complete annotations, the description provides the essential filter context. Nothing critical is missing for an agent to invoke it correctly.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, with limit and cursor both fully documented. The description itself adds no parameter-level meaning, so the baseline score of 3 applies.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a specific verb ('List'), a clear resource ('cities'), and a meaningful filter ('at least one published venue'). This distinguishes it from sibling tools focused on destinations or venues and leaves no ambiguity about what the tool returns.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies the usage context: use this tool when you need cities that have published venues. However, it does not explicitly discuss when to prefer this over sibling tools like get_destination or search_destinations, though no direct alternative is obvious.

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

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