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by app.openkrill
OverviewDiscussionsAdmin

Get App Store and Google Play reviews

get_app_reviews
Read-onlyIdempotent

Fetch app metadata and recent user reviews for a Google Play or iOS App Store app by store URL, Apple numeric id or Google Play package name, filtered by country, language, date and sort order. Use when the user wants to know what customers complain about or praise. Returns one app row (title, developer, rating, rating count, version) followed by review rows (rating, text, date, app version, helpful votes, developer reply). Apple's public reviews feed is sometimes empty; the app then returns its metadata plus an error row with code "unavailable" instead of reviews. Reviewer identity is never included.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "apps": "<apps>"
    },
    "name": "get_app_reviews"
  }
}

Input Schema

NameRequiredDescriptionDefault
appsYesApp Store or Google Play URLs, Apple numeric ids (id310633997) or Play package names (com.spotify.music)
sortNoReview order. Defaults to newest
countriesNoTwo-letter country codes. Defaults to ["us"]
languagesNoGoogle Play language codes. Defaults to ["en"]
sinceDateNoISO date; only reviews on or after it
maxReviewsPerAppNoReviews per app, country and language. Default 100, 0 returns app metadata only

Output Schema

NameRequiredDescriptionDefault
cacheYesHow the result was served: HIT or STALE from a cache tier, MISS or BYPASS when it was fetched now.
resultsYesOne app row per app with its rating summary, then its review rows, and an error row per app that could not be read.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
+  "properties": {
+    "cache": {
+      "description": "How the result was served: HIT or STALE from a cache tier, MISS or BYPASS when it was fetched now.",
+      "properties": {
+        "ageSeconds": {
+          "type": "number"
+        },
+        "source": {
+          "enum": [
+            "worker",
+            "origin",
+            "coalesced"
+          ],
+          "type": "string"
+        },
+        "status": {
+          "enum": [
+            "HIT",
+            "STALE",
+            "MISS",
+            "BYPASS"
+          ],
+          "type": "string"
+        },
+        "tier": {
+          "type": "string"
+        },
+        "ttlSeconds": {
+          "type": "number"
+        }
+      },
+      "required": [
+        "status",
+        "tier",
+        "ageSeconds",
+        "ttlSeconds"
+      ],
+      "type": "object"
+    },
+    "results": {
+      "description": "One app row per app with its rating summary, then its review rows, and an error row per app that could not be read.",
+      "items": {
+        "anyOf": [
+          {
+            "additionalProperties": true,
+            "properties": {
+              "appId": {
+                "type": "string"
+              },
+              "country": {
+                "type": "string"
+              },
+              "developer": {
+                "type": "string"
+              },
+              "ratingAverage": {
+                "type": [
+                  "number",
+                  "null"
+                ]
+              },
+              "ratingCount": {
+                "type": [
+                  "number",
+                  "null"
+                ]
+              },
+              "store": {
+                "type": "string"
+              },
+              "title": {
+                "type": "string"
+              },
+              "type": {
+                "const": "app"
+              },
+              "url": {
+                "type": "string"
+              },
+              "version": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              }
+            },
+            "required": [
+              "type",
+              "store",
+              "appId",
+              "country",
+              "title",
+              "developer",
+              "url"
+            ],
+            "type": "object"
+          },
+          {
+            "additionalProperties": true,
+            "properties": {
+              "appId": {
+                "type": "string"
+              },
+              "appVersion": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "country": {
+                "type": "string"
+              },
+              "date": {
+                "type": "string"
+              },
+              "rating": {
+                "type": "number"
+              },
+              "reviewId": {
+                "type": "string"
+              },
+              "store": {
+                "type": "string"
+              },
+              "text": {
+                "type": "string"
+              },
+              "title": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "type": {
+                "const": "review"
+              }
+            },
+            "required": [
+              "type",
+              "store",
+              "appId",
+              "reviewId",
+              "rating",
+              "text",
+              "date"
+            ],
+            "type": "object"
+          },
+          {
+            "additionalProperties": true,
+            "properties": {
+              "appId": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "code": {
+                "type": "string"
+              },
+              "input": {
+                "type": "string"
+              },
+              "message": {
+                "type": "string"
+              },
+              "retryable": {
+                "type": "boolean"
+              },
+              "store": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "type": {
+                "const": "error"
+              }
+            },
+            "required": [
+              "type",
+              "input",
+              "code",
+              "message",
+              "retryable"
+            ],
+            "type": "object"
+          }
+        ]
+      },
+      "type": "array"
+    }
+  },
+  "required": [
+    "results",
+    "cache"
+  ],
+  "type": "object"
+}
  2. First observed

TDQS

A4.4/5.0
Behavior5/5

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

Despite annotations covering readOnly/idempotent semantics, the description adds valuable non-obvious behavior: Apple reviews may be empty and the tool substitutes an error row with code 'unavailable', the return shape is described (app row then review rows), and it discloses that reviewer identity is never included. These are important operational traits an agent must know.

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

Conciseness4/5

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

The description is front-loaded with the core action and identifier forms, then moves to usage, return format, and edge-case behavior. It is information-dense with little waste, though it is slightly long relative to the schema's completeness. No sentences are purely redundant.

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 read-only tool with a rich schema and output schema, the description covers the essential operational context: identifier formats, filtering, return structure, and the important empty-Apple-reviews edge case. Combined with annotations and output schema, an agent has everything needed to invoke and interpret results.

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 coverage is 100%, so the schema already documents all six parameters including enums and defaults. The description summarizes filtering dimensions (country, language, date, sort order) but adds no syntax or format details beyond what the schema provides. Baseline 3 is correct when the schema does the heavy lifting.

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+resource ('Fetch app metadata and recent user reviews') for both Apple App Store and Google Play, and it names the accepted identifier forms. This clearly distinguishes it from siblings like get_transcript or read_x_post, which target different data sources. An agent can select this tool without ambiguity.

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

Usage Guidelines4/5

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

It explicitly says 'Use when the user wants to know what customers complain about or praise,' which is strong contextual guidance. However, it does not name alternatives or state when NOT to use this tool, so it falls short of the 5-point bar that requires explicit when-not/alternatives.

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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