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WeChat Mini Program Dev MCP

WeChat Mini Program Dev MCP

by yfmeii
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Local

mp_callWx

Invoke WeChat Mini Program API methods to control pages and components programmatically.

Instructions

调用微信小程序 API 方法，（如 wx.pageScrollTo）。

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": {
      "method": "<method>"
    },
    "name": "mp_callWx"
  }
}

Input Schema

NameRequiredDescriptionDefault
connectionNo
methodYes
argsNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Addedv0.2.4
  2. Removedv0.1.6
  3. Changed2 schema fields changedv1.0.0
    • addedInput schema / $schema
      Added value: +"http://json-schema.org/draft-07/schema#"
    • addedInput schema / additionalProperties
      Added value: +false
  4. First observed

TDQS

C2.4/5.0
Behavior2/5

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

No annotations are provided, so the description must disclose behavioral traits. It does not mention that a connection via the 'connection' parameter is required, nor any side effects, error handling, or rate limits. The example is insufficient.

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

Conciseness3/5

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

The description is a single short sentence, which is concise but lacks structure. It does not front-load critical information like required parameters or return values.

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?

Given the tool's complexity (3 parameters including a nested object, no output schema, no annotations), the description is severely incomplete. It omits prerequisites, return values, error handling, and how to use the 'connection' parameter.

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

Parameters1/5

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

With 0% schema description coverage, the description must add meaning to parameters. It only mentions 'method' implicitly and ignores 'connection' and 'args', failing to explain their roles or requirements.

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

Purpose4/5

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

The description clearly states the tool calls WeChat Mini Program API methods like `wx.pageScrollTo`, indicating a specific verb and resource. It distinguishes from sibling tools like `mp_navigate` which are for specific operations, but the description is broad.

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

Usage Guidelines2/5

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

No guidance on when to use this tool versus alternatives such as `mp_navigate` or `mp_screenshot`. The description lacks context on prerequisites or use cases.

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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