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app-store-connect-mcp

app-store-connect-mcp

by devinwang
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TypeScript
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apps_asset_library_get_to_one_relationship

Retrieve the asset library relationship for a specific app by its ID. Use this to fetch linked asset library data for an App Store Connect app.

Instructions

GET /v1/apps/{id}/relationships/assetLibrary (GET /v1/apps/{id}/relationships/assetLibrary)

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": {
      "id": "<id>"
    },
    "name": "apps_asset_library_get_to_one_relationship"
  }
}

Input Schema

NameRequiredDescriptionDefault
idYesthe id of the requested resource

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.5.0

TDQS

D1.7/5.0
Behavior1/5

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

No annotations are provided, so the description carries the full behavioral burden, and it discloses nothing: not whether the call requires auth, what a 'to-one relationship' response contains (linkage only vs. included resource), or error behavior for a missing/unauthorized app. A bare URL is not behavioral disclosure.

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

Conciseness2/5

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

It is short, but the only content is the path repeated verbatim inside parentheses, which is pure duplication with no informational value. Brevity here reflects under-specification rather than efficient structure.

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

Completeness1/5

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

With no annotations and no output schema, the description is the only source of context, and it provides none. An agent cannot tell what this returns (a relationship linkage, likely with related-resource linkage URLs) or how it differs from the '_get_to_one_related' sibling.

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?

There is a single parameter whose schema description ('the id of the requested resource') has 100% coverage, so the baseline is 3. The description adds nothing beyond the schema, but nothing is missing either.

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

Purpose2/5

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

The description only restates the HTTP path (GET /v1/apps/{id}/relationships/assetLibrary), which maps almost one-to-one onto the tool name 'apps_asset_library_get_to_one_relationship'. It conveys no semantics an agent couldn't infer from the name itself, and it does nothing to distinguish this from the near-identical sibling 'apps_asset_library_get_to_one_related'.

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

Usage Guidelines1/5

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

There is no when-to-use guidance, no mention of the related/relationship variant split, and no preconditions (e.g., that 'id' must be an app resource id). The agent is left to guess between this tool and the many sibling relationship endpoints.

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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